bump version 0.52

android/AndroidManifest.xml

 <?xml version="1.0"?>
-<manifest package="org.humboldtka.vplan" xmlns:android="http://schemas.android.com/apk/res/android" android:versionName="0.51" android:versionCode="1" android:installLocation="auto">
+<manifest package="org.humboldtka.vplan" xmlns:android="http://schemas.android.com/apk/res/android" android:versionName="0.52" android:versionCode="1" android:installLocation="auto">
     <application android:hardwareAccelerated="true" android:name="org.qtproject.qt5.android.bindings.QtApplication" android:label="HGK Vertretungsplan" android:icon="@drawable/icon">
-        <activity android:configChanges="orientation|uiMode|screenLayout|screenSize|smallestScreenSize|layoutDirection|locale|fontScale|keyboard|keyboardHidden|navigation" android:name="org.qtproject.qt5.android.bindings.QtActivity" android:label="HGK Vertretungsplan 0.51" android:screenOrientation="unspecified" android:launchMode="singleTop">
+        <activity android:configChanges="orientation|uiMode|screenLayout|screenSize|smallestScreenSize|layoutDirection|locale|fontScale|keyboard|keyboardHidden|navigation" android:name="org.qtproject.qt5.android.bindings.QtActivity" android:label="HGK Vertretungsplan 0.52" android:screenOrientation="unspecified" android:launchMode="singleTop">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
                 <category android:name="android.intent.category.LAUNCHER"/>

main.qml

@@ -13,7 +13,7 @@ ApplicationWindow {
     id: root
     objectName: "root"
     property string appname: "Qt-vplan-frontend"
-    property string version: "0.51" // todo: change twice in AndroidManifest.xml
+    property string version: "0.52" // todo: change twice in AndroidManifest.xml
     property bool debug: Qt.application.arguments.indexOf("--debug") >= 0 ? true : false
     //property bool debug: true
     property bool monitor: Qt.application.arguments.indexOf("--monitor") >= 0 ? true : false