Use common StackView

Gui/main.qml

@@ -10,10 +10,6 @@ ApplicationWindow {
     property string confile: ""
     property alias settingsFileDialog: settingsFiledialog
 
-    function goToLogin() {
-        appLoader.source = "LoginScreen.qml";
-        navigation.visible = true;
-    }
     function showWindow(why) {
         if (why === 3) {
             systray.setVisible(false);
@@ -30,16 +26,15 @@ ApplicationWindow {
     width: Screen.width * .75
 
     Component.onCompleted: {
-        config.configurationReady.connect(goToLogin);
         systray.activated.connect(showWindow);
 
         if (bad_config) {
             importDialog.open();
         } else {
             if (db_con)
-                appLoader.source = "LoginScreen.qml";
+                contentStack.replace("LoginScreen.qml")
             else
-                appLoader.source = "NoDbConnection.qml";
+                contentStack.replace("NoDbConnection.qml");
         }
     }
     onClosing: close => {
@@ -63,7 +58,7 @@ ApplicationWindow {
     Navigation {
         id: navigation
 
-        visible: bad_config || !db_con ? false : true
+        visible: !(bad_config || !db_con)
     }
     PrinterDialog {
         id: printerDialog
@@ -82,17 +77,15 @@ ApplicationWindow {
         id: contentBackground
         anchors {
             bottom: parent.bottom
-            left: navigation.right
+            left: navigation.visible ? navigation.right : parent.left
             right: parent.right
             top: parent.top
         }
         color: Colors.background
     }
 
-    Loader {
-        id: appLoader
-
-        property alias window: appWindow
+    StackView {
+        id: contentStack
 
         anchors {
             fill: contentBackground
@@ -109,7 +102,7 @@ ApplicationWindow {
         title: qsTr("Einstellungen importieren")
 
         onAccepted: settingsFiledialog.open()
-        onRejected: appLoader.source = "Firststart.qml"
+        onRejected: contentStack.replace("Firststart.qml")
     }
     FileDialog {
         id: settingsFiledialog