Fixed first start configuration load and add city model in add customer

Gui/AddCustomer.qml

@@ -95,6 +95,7 @@ ColumnLayout
                 popup.height: 300
                 popup.y: postcode.y + 5 - (postcode.height * 2)
                 currentIndex: -1
+                onCurrentIndexChanged: city.currentIndex = postcode.currentIndex
             }
 
             Label
@@ -110,7 +111,12 @@ ColumnLayout
                 editable: true
                 onEditTextChanged: isEmptyField()
                 onCurrentTextChanged: isEmptyField()
-                model: ["", "MarcosDorf", "OschkarsLand"]
+                model: am
+                textRole: "city"
+                popup.height: 300
+                popup.y: postcode.y + 5 - (postcode.height * 2)
+                currentIndex: -1
+                onCurrentIndexChanged: postcode.currentIndex = city.currentIndex
             }
 
             Label