Added visualization for unclean undo stack. (No safe guard before closing on an unclean stack yet.)

Main.qml

@@ -1,13 +1,19 @@
 import QtQuick
+import QtQuick.Controls.Material
 import QtQuick.Layouts
 import QtQml.Models
 
 Window {
+    property bool isDataModified: !appUndoStack.isClean
+
+    property string titleClean: `${Application.name}`
+    property string titleDirty: `${Application.name}` + " *"
+
     id: window
     width: 480
     height: 800
     visible: true
-    title: `${Application.name}`
+    title: appUndoStack.clean ? titleClean : titleDirty
 
     property int fontSize: 16
 
@@ -29,4 +35,18 @@ Window {
         id: listPage
         anchors.fill: parent
     }
+
+    Component.onCompleted: {
+        // core.displayStatusMessage.connect(displayStatusMessage)
+        appUndoStack.cleanChanged.connect(cleanChanged)
+        // core.userConfigChanged.connect(onUserConfigChanged)
+    }
+
+    function cleanChanged() {
+        let clean = appUndoStack.clean
+        console.debug("Clean state changed to: " + clean)
+        // if (!clean) {
+        //     footerText.text = ""
+        // }
+    }
 }

main.cpp

@@ -3,7 +3,7 @@
 #include <QQmlContext>
 #include <QUndoCommand>
 
-#include <model/generalsortfiltermodel.h>
+#include "model/generalsortfiltermodel.h"
 
 #include "genericcore.h"