refactor: Remove empty caption from ThreadSafeMessageBox

diff --git a/src/httpserver.cpp b/src/httpserver.cpp
index 6cf47eba..c55922ce 100644
--- a/src/httpserver.cpp
+++ b/src/httpserver.cpp
@@ -230,7 +230,7 @@ static bool InitHTTPAllowList()
         if (!subnet.IsValid()) {
             uiInterface.ThreadSafeMessageBox(
                 Untranslated(strprintf("Invalid -rpcallowip subnet specification: %s. Valid values are a single IP (e.g. 1.2.3.4), a network/netmask (e.g. 1.2.3.4/255.255.255.0), a network/CIDR (e.g. 1.2.3.4/24), all ipv4 (0.0.0.0/0), or all ipv6 (::/0). RFC4193 is allowed only if -cjdnsreachable=0.", strAllow)),
-                "", CClientUIInterface::MSG_ERROR);
+                CClientUIInterface::MSG_ERROR);
             return false;
         }
         rpc_allow_subnets.push_back(subnet);
diff --git a/src/init.cpp b/src/init.cpp
index e353fdfa..2a2fc42e 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -1377,7 +1377,7 @@ static ChainstateLoadResult InitAndLoadChainstate(
     options.coins_error_cb = [] {
         uiInterface.ThreadSafeMessageBox(
             _("Error reading from database, shutting down."),
-            "", CClientUIInterface::MSG_ERROR);
+            CClientUIInterface::MSG_ERROR);
     };
     uiInterface.InitMessage(_("Loading block index…"));
     auto catch_exceptions = [](auto&& f) -> ChainstateLoadResult {
diff --git a/src/interfaces/node.h b/src/interfaces/node.h
index e01b1cc7..6a051d8d 100644
--- a/src/interfaces/node.h
+++ b/src/interfaces/node.h
@@ -219,7 +219,7 @@ public:
 
     //! Register handler for message box messages.
     using MessageBoxFn =
-        std::function<bool(const bilingual_str& message, const std::string& caption, unsigned int style)>;
+        std::function<bool(const bilingual_str& message, unsigned int style)>;
     virtual std::unique_ptr<Handler> handleMessageBox(MessageBoxFn fn) = 0;
 
     //! Register handler for question messages.
diff --git a/src/net.cpp b/src/net.cpp
index d92cb72c..9b8644fe 100644
--- a/src/net.cpp
+++ b/src/net.cpp
@@ -3423,7 +3423,7 @@ bool CConnman::Bind(const CService& addr_, unsigned int flags, NetPermissionFlag
     bilingual_str strError;
     if (!BindListenPort(addr, strError, permissions)) {
         if ((flags & BF_REPORT_ERROR) && m_client_interface) {
-            m_client_interface->ThreadSafeMessageBox(strError, "", CClientUIInterface::MSG_ERROR);
+            m_client_interface->ThreadSafeMessageBox(strError, CClientUIInterface::MSG_ERROR);
         }
         return false;
     }
@@ -3478,7 +3478,7 @@ bool CConnman::Start(CScheduler& scheduler, const Options& connOptions)
         if (m_client_interface) {
             m_client_interface->ThreadSafeMessageBox(
                 _("Failed to listen on any port. Use -listen=0 if you want this."),
-                "", CClientUIInterface::MSG_ERROR);
+                CClientUIInterface::MSG_ERROR);
         }
         return false;
     }
@@ -3546,7 +3546,7 @@ bool CConnman::Start(CScheduler& scheduler, const Options& connOptions)
         if (m_client_interface) {
             m_client_interface->ThreadSafeMessageBox(
                 _("Cannot provide specific connections and have addrman find outgoing connections at the same time."),
-                "", CClientUIInterface::MSG_ERROR);
+                CClientUIInterface::MSG_ERROR);
         }
         return false;
     }
diff --git a/src/node/interface_ui.cpp b/src/node/interface_ui.cpp
index 3f3638bf..d96c5155 100644
--- a/src/node/interface_ui.cpp
+++ b/src/node/interface_ui.cpp
@@ -47,7 +47,7 @@ ADD_SIGNALS_IMPL_WRAPPER(NotifyBlockTip);
 ADD_SIGNALS_IMPL_WRAPPER(NotifyHeaderTip);
 ADD_SIGNALS_IMPL_WRAPPER(BannedListChanged);
 
-bool CClientUIInterface::ThreadSafeMessageBox(const bilingual_str& message, const std::string& caption, unsigned int style) { return g_ui_signals.ThreadSafeMessageBox(message, caption, style).value_or(false);}
+bool CClientUIInterface::ThreadSafeMessageBox(const bilingual_str& message, unsigned int style) { return g_ui_signals.ThreadSafeMessageBox(message, style).value_or(false);}
 bool CClientUIInterface::ThreadSafeQuestion(const bilingual_str& message, const std::string& non_interactive_message, unsigned int style) { return g_ui_signals.ThreadSafeQuestion(message, non_interactive_message, style).value_or(false);}
 void CClientUIInterface::InitMessage(const std::string& message) { return g_ui_signals.InitMessage(message); }
 void CClientUIInterface::InitWallet() { return g_ui_signals.InitWallet(); }
@@ -61,7 +61,7 @@ void CClientUIInterface::BannedListChanged() { return g_ui_signals.BannedListCha
 
 bool InitError(const bilingual_str& str)
 {
-    uiInterface.ThreadSafeMessageBox(str, "", CClientUIInterface::MSG_ERROR);
+    uiInterface.ThreadSafeMessageBox(str, CClientUIInterface::MSG_ERROR);
     return false;
 }
 
@@ -79,5 +79,5 @@ bool InitError(const bilingual_str& str, const std::vector<std::string>& details
 
 void InitWarning(const bilingual_str& str)
 {
-    uiInterface.ThreadSafeMessageBox(str, "", CClientUIInterface::MSG_WARNING);
+    uiInterface.ThreadSafeMessageBox(str, CClientUIInterface::MSG_WARNING);
 }
diff --git a/src/node/interface_ui.h b/src/node/interface_ui.h
index e2946f63..ce5171bb 100644
--- a/src/node/interface_ui.h
+++ b/src/node/interface_ui.h
@@ -74,9 +74,9 @@ public:
     boost::signals2::connection signal_name##_connect(std::function<signal_name##Sig> fn)
 
     /** Show message box. */
-    ADD_SIGNALS_DECL_WRAPPER(ThreadSafeMessageBox, bool, const bilingual_str& message, const std::string& caption, unsigned int style);
+    ADD_SIGNALS_DECL_WRAPPER(ThreadSafeMessageBox, bool, const bilingual_str& message, unsigned int style);
 
-    /** If possible, ask the user a question. If not, falls back to ThreadSafeMessageBox(noninteractive_message, caption, style) and returns false. */
+    /** If possible, ask the user a question. If not, falls back to ThreadSafeMessageBox(noninteractive_message, style) and returns false. */
     ADD_SIGNALS_DECL_WRAPPER(ThreadSafeQuestion, bool, const bilingual_str& message, const std::string& noninteractive_message, unsigned int style);
 
     /** Progress message during initialization. */
diff --git a/src/noui.cpp b/src/noui.cpp
index 8f16752d..7451a999 100644
--- a/src/noui.cpp
+++ b/src/noui.cpp
@@ -19,7 +19,7 @@ boost::signals2::connection noui_ThreadSafeMessageBoxConn;
 boost::signals2::connection noui_ThreadSafeQuestionConn;
 boost::signals2::connection noui_InitMessageConn;
 
-bool noui_ThreadSafeMessageBox(const bilingual_str& message, const std::string& caption, unsigned int style)
+bool noui_ThreadSafeMessageBox(const bilingual_str& message, unsigned int style)
 {
     bool fSecure = style & CClientUIInterface::SECURE;
     style &= ~CClientUIInterface::SECURE;
@@ -39,7 +39,7 @@ bool noui_ThreadSafeMessageBox(const bilingual_str& message, const std::string&
         if (!fSecure) LogInfo("%s\n", message.original);
         break;
     default:
-        strCaption = caption + ": "; // Use supplied caption (can be empty)
+        strCaption = ": "; // caption is always empty TODO fix this
         if (!fSecure) LogInfo("%s%s\n", strCaption, message.original);
     }
 
@@ -49,7 +49,7 @@ bool noui_ThreadSafeMessageBox(const bilingual_str& message, const std::string&
 
 bool noui_ThreadSafeQuestion(const bilingual_str& /* ignored interactive message */, const std::string& message, unsigned int style)
 {
-    return noui_ThreadSafeMessageBox(Untranslated(message), /*caption=*/"", style);
+    return noui_ThreadSafeMessageBox(Untranslated(message), style);
 }
 
 void noui_InitMessage(const std::string& message)
@@ -64,9 +64,9 @@ void noui_connect()
     noui_InitMessageConn = uiInterface.InitMessage_connect(noui_InitMessage);
 }
 
-bool noui_ThreadSafeMessageBoxRedirect(const bilingual_str& message, const std::string& caption, unsigned int style)
+bool noui_ThreadSafeMessageBoxRedirect(const bilingual_str& message, unsigned int style)
 {
-    LogInfo("%s: %s", caption, message.original);
+    LogInfo("%s", message.original);
     return false;
 }
 
diff --git a/src/noui.h b/src/noui.h
index e869fa82..332346f5 100644
--- a/src/noui.h
+++ b/src/noui.h
@@ -10,7 +10,7 @@
 struct bilingual_str;
 
 /** Non-GUI handler, which logs and prints messages. */
-bool noui_ThreadSafeMessageBox(const bilingual_str& message, const std::string& caption, unsigned int style);
+bool noui_ThreadSafeMessageBox(const bilingual_str& message, unsigned int style);
 /** Non-GUI handler, which logs and prints questions. */
 bool noui_ThreadSafeQuestion(const bilingual_str& /* ignored interactive message */, const std::string& message, unsigned int style);
 /** Non-GUI handler, which only logs a message. */
diff --git a/src/qt/bitcoingui.cpp b/src/qt/bitcoingui.cpp
index 13f4cb05..3c3f84c7 100644
--- a/src/qt/bitcoingui.cpp
+++ b/src/qt/bitcoingui.cpp
@@ -1615,8 +1615,8 @@ static bool ThreadSafeMessageBox(BitcoinGUI* gui, const bilingual_str& message,
 void BitcoinGUI::subscribeToCoreSignals()
 {
     // Connect signals to client
-    m_handler_message_box = m_node.handleMessageBox([this](const bilingual_str& message, const std::string& caption, unsigned int style) {
-        return ThreadSafeMessageBox(this, message, caption, style);
+    m_handler_message_box = m_node.handleMessageBox([this](const bilingual_str& message, unsigned int style) {
+        return ThreadSafeMessageBox(this, message, /*caption=*/"", style);
     });
     m_handler_question = m_node.handleQuestion([this](const bilingual_str& message, const std::string& /*non_interactive_message*/, unsigned int style) {
         return ThreadSafeMessageBox(this, message, /*caption=*/"", style);