Use common StackView

Gui/Navigation.qml

@@ -19,10 +19,7 @@ ColumnLayout {
         ButtonGroup.group: buttonBar
         icon.source: "qrc:/images/dash.svg"
         text: qsTr("Dashboard")
-
-        onClicked: {
-            appLoader.source = "Dashboard.qml";
-        }
+        target: "/Gui/Dashboard.qml"
     }
     BarButton {
         id: kunden
@@ -30,10 +27,7 @@ ColumnLayout {
         ButtonGroup.group: buttonBar
         icon.source: "qrc:/images/customer.svg"
         text: qsTr("Kunden")
-
-        onClicked: {
-            appLoader.source = "CustomerTable.qml";
-        }
+        target: "/Gui/CustomersTable.qml"
     }
     BarButton {
         id: objekt
@@ -41,10 +35,7 @@ ColumnLayout {
         ButtonGroup.group: buttonBar
         icon.source: "qrc:/images/object.svg"
         text: qsTr("Objekt")
-
-        onClicked: {
-            appLoader.source = "ObjectTable.qml";
-        }
+        target: "/Gui/ObjectsTable.qml"
     }
     BarButton {
         id: mitarbeiter
@@ -52,10 +43,7 @@ ColumnLayout {
         ButtonGroup.group: buttonBar
         icon.source: "qrc:/images/employee.svg"
         text: qsTr("Mitarbeiter")
-
-        onClicked: {
-            appLoader.source = "Employees/EmployeesView.qml";
-        }
+        target: "/Gui/Employees/EmployeesTable.qml"
     }
     BarButton {
         id: offers
@@ -63,10 +51,7 @@ ColumnLayout {
         ButtonGroup.group: buttonBar
         icon.source: "qrc:/images/offer.svg"
         text: qsTr("Angebote")
-
-        onClicked: {
-            appLoader.source = "OfferTable.qml";
-        }
+        target: "/Gui/OffersTable.qml"
     }
     BarButton {
         id: abrechnung
@@ -101,7 +86,7 @@ ColumnLayout {
                 onTriggered: {
                     // TODO: Check if logged-in user is admin first!!
 
-                    appLoader.source = "PyqcrmConf.qml";
+                    contentStack.push("PyqcrmConf.qml");
                 }
             }
             MenuSeparator {