qml: adapt exception dialog to edge-to-edge layout

Even though the exception dialog inherits from ElDialog the padding
didn't work as it overwrites the properties of the ElDialog. So the
padding has to be applied separately to the ExceptionDialog.

electrum/gui/qml/components/ExceptionDialog.qml

@@ -18,10 +18,14 @@ ElDialog
     width: parent.width
     height: parent.height
     z: 1000  // assure topmost of all other dialogs. note: child popups need even higher!
+    // disable padding in ElDialog as it is overwritten here and shows no effect, this dialog needs padding though
+    needsSystemBarPadding: false
 
     header: null
 
     ColumnLayout {
+        anchors.topMargin: app.statusBarHeight  // edge-to-edge layout padding
+        anchors.bottomMargin: app.navigationBarHeight
         anchors.fill: parent
         enabled: !_sending