QML UI: save with unchanged credentials returns to dive list

If the user is on the credentials page, doesn't change the credentials
but simply taps on save, they now get back to the dive list.

Fixes #1047

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

mobile-widgets/qml/main.qml

@@ -16,7 +16,7 @@ Kirigami.ApplicationWindow {
 	header.preferredHeight: Kirigami.Units.gridUnit * (Qt.platform.os == "ios" ? 2 : 1)
 	header.maximumHeight: Kirigami.Units.gridUnit * 2
 	property bool fullscreen: true
-	property int oldStatus: -1
+	property alias oldStatus: manager.oldStatus
 	property alias accessingCloud: manager.accessingCloud
 	property QtObject notification: null
 	property bool showingDiveList: false