Move QML Python stuff to its own subfolder

src/gui/PythonBridge/PythonBridge.qml

@@ -9,7 +9,7 @@ Python {
     property bool startupAnyAccountsSaved: false
     property var pendingCoroutines: ({})
 
-    property PythonEventHandlers eventHandlers: PythonEventHandlers {}
+    property EventHandlers eventHandlers: EventHandlers {}
 
 
     function newQmlFuture() {

src/gui/Window.qml

@@ -1,6 +1,7 @@
 import QtQuick 2.12
 import QtQuick.Controls 2.12
 import "Base"
+import "PythonBridge"
 
 ApplicationWindow {
     id: window