Show unsaved changes warning for map list and layout-only edits

include/core/map.h

@@ -101,7 +101,7 @@ public:
     QUndoStack editHistory;
     void modify();
     void clean();
-    bool hasUnsavedChanges();
+    bool hasUnsavedChanges() const;
     void pruneEditHistory();
 
 private:

include/core/maplayout.h

@@ -104,7 +104,7 @@ public:
     void clearBorderCache();
     void cacheBorder();
 
-    bool hasUnsavedChanges();
+    bool hasUnsavedChanges() const;
 
     bool layoutBlockChanged(int i, const Blockdata &cache);
 

include/project.h

@@ -144,6 +144,9 @@ public:
 
     int appendMapsec(QString name);
 
+    bool hasUnsavedChanges();
+    bool hasUnsavedDataChanges = false;
+
     QSet<QString> getTopLevelMapFields();
     bool loadMapData(Map*);
     bool readMapLayouts();