qml: unify dialog headers

electrum/gui/qml/components/controls/ElDialog.qml

@@ -6,6 +6,7 @@ Dialog {
     id: abstractdialog
 
     property bool allowClose: true
+    property string iconSource
 
     onOpenedChanged: {
         if (opened) {
@@ -14,4 +15,42 @@ Dialog {
             app.activeDialogs.pop()
         }
     }
+
+    header: ColumnLayout {
+        spacing: 0
+
+        RowLayout {
+            spacing: 0
+
+            Image {
+                visible: iconSource
+                source: iconSource
+                Layout.preferredWidth: constants.iconSizeXLarge
+                Layout.preferredHeight: constants.iconSizeXLarge
+                Layout.leftMargin: constants.paddingMedium
+                Layout.topMargin: constants.paddingMedium
+                Layout.bottomMargin: constants.paddingMedium
+            }
+
+            Label {
+                text: title
+                elide: Label.ElideRight
+                Layout.fillWidth: true
+                leftPadding: constants.paddingXLarge
+                topPadding: constants.paddingXLarge
+                bottomPadding: constants.paddingXLarge
+                font.bold: true
+                font.pixelSize: constants.fontSizeMedium
+            }
+        }
+
+        Rectangle {
+            Layout.fillWidth: true
+            Layout.leftMargin: constants.paddingXXSmall
+            Layout.rightMargin: constants.paddingXXSmall
+            height: 1
+            color: Qt.rgba(0,0,0,0.5)
+        }
+    }
+
 }