qml: additional styling InfoTextArea in dialogs

diff --git a/electrum/gui/qml/components/InvoiceDialog.qml b/electrum/gui/qml/components/InvoiceDialog.qml
index f2edb0f..2a91e58 100644
--- a/electrum/gui/qml/components/InvoiceDialog.qml
+++ b/electrum/gui/qml/components/InvoiceDialog.qml
@@ -295,6 +295,8 @@ ElDialog {
                                 id: maxAmountMessage
                                 visible: amountMax.checked && text
                                 compact: true
+                                backgroundColor: constants.darkerDialogBackground
+
                                 Connections {
                                     target: invoice
                                     function onMaxAmountMessage(message) {
diff --git a/electrum/gui/qml/components/LnurlPayRequestDialog.qml b/electrum/gui/qml/components/LnurlPayRequestDialog.qml
index 195eea3..da2a9f8 100644
--- a/electrum/gui/qml/components/LnurlPayRequestDialog.qml
+++ b/electrum/gui/qml/components/LnurlPayRequestDialog.qml
@@ -43,6 +43,7 @@ ElDialog {
                 compact: true
                 visible: invoiceParser.lnurlData['min_sendable_sat'] != invoiceParser.lnurlData['max_sendable_sat']
                 text: qsTr('Amount must be between %1 and %2 %3').arg(Config.formatSats(invoiceParser.lnurlData['min_sendable_sat'])).arg(Config.formatSats(invoiceParser.lnurlData['max_sendable_sat'])).arg(Config.baseUnit)
+                backgroundColor: constants.darkerDialogBackground
             }
 
             Label {
diff --git a/electrum/gui/qml/components/LnurlWithdrawRequestDialog.qml b/electrum/gui/qml/components/LnurlWithdrawRequestDialog.qml
index 4e047e5..e68c384 100644
--- a/electrum/gui/qml/components/LnurlWithdrawRequestDialog.qml
+++ b/electrum/gui/qml/components/LnurlWithdrawRequestDialog.qml
@@ -76,6 +76,7 @@ ElDialog {
                           + '\n\n'
                           + qsTr('Do a submarine swap in the \'Channels\' tab to get more incoming liquidity.')
                 iconStyle: InfoTextArea.IconStyle.Error
+                backgroundColor: constants.darkerDialogBackground
             }
 
             InfoTextArea {
@@ -84,9 +85,10 @@ ElDialog {
                 compact: true
                 visible: !dialog.insufficientLiquidity && dialog.providerMinWithdrawable != dialog.providerMaxWithdrawable
                 text: qsTr('Amount must be between %1 and %2 %3')
-                .arg(Config.formatSats(dialog.effectiveMinWithdrawable))
-                .arg(Config.formatSats(dialog.effectiveMaxWithdrawable))
-                .arg(Config.baseUnit)
+                        .arg(Config.formatSats(dialog.effectiveMinWithdrawable))
+                        .arg(Config.formatSats(dialog.effectiveMaxWithdrawable))
+                        .arg(Config.baseUnit)
+                backgroundColor: constants.darkerDialogBackground
             }
 
             InfoTextArea {
@@ -100,6 +102,7 @@ ElDialog {
                         + ' '
                         + qsTr('You may need to do a submarine swap to increase your incoming liquidity.')
                 iconStyle: InfoTextArea.IconStyle.Warn
+                backgroundColor: constants.darkerDialogBackground
             }
 
             Label {
diff --git a/electrum/gui/qml/components/OpenChannelDialog.qml b/electrum/gui/qml/components/OpenChannelDialog.qml
index 4315510..a9b6f3d 100644
--- a/electrum/gui/qml/components/OpenChannelDialog.qml
+++ b/electrum/gui/qml/components/OpenChannelDialog.qml
@@ -234,17 +234,21 @@ ElDialog {
                     text: channelopener.warning
                     visible: text
                     compact: true
+                    backgroundColor: constants.darkerDialogBackground
                 }
 
             }
         }
 
-        FlatButton {
+        DialogButtonContainer {
             Layout.fillWidth: true
-            text: qsTr('Open Channel...')
-            icon.source: '../../icons/confirmed.png'
-            enabled: channelopener.valid
-            onClicked: channelopener.openChannel()
+            FlatButton {
+                Layout.fillWidth: true
+                text: qsTr('Open Channel...')
+                icon.source: '../../icons/confirmed.png'
+                enabled: channelopener.valid
+                onClicked: channelopener.openChannel()
+            }
         }
     }