Reorder QML files to follow coding conventions

https://doc.qt.io/qt-5/qml-codingconventions.html#qml-object-declarations

src/gui/UI.qml

@@ -10,10 +10,6 @@ import "MainPane"
 
 Item {
     id: mainUI
-    focus: true
-
-    Component.onCompleted: window.mainUI = mainUI
-
 
     property bool accountsPresent:
         ModelStore.get("accounts").count > 0 || py.startupAnyAccountsSaved
@@ -35,12 +31,14 @@ Item {
     readonly property alias fontMetrics: fontMetrics
     readonly property alias idleManager: idleManager
 
-
     function reloadSettings() {
         py.loadSettings(() => { mainUI.pressAnimation.start() })
     }
 
 
+    focus: true
+    Component.onCompleted: window.mainUI = mainUI
+
     SequentialAnimation {
         id: pressAnimation
         HNumberAnimation {