refs #568, specialized view class for DB objects

* CViewWithDbObjects
* new menu for views (delete key, remove)
* adjusted derived classes

src/blackgui/shortcut.h

@@ -44,6 +44,12 @@ namespace BlackGui
 
         //! Save in views
         static const QKeySequence &keySaveViews();
+
+        //! Delete, e.g. selected rows
+        static const QKeySequence &keyDelete();
+
+        //! Escape
+        static const QKeySequence &keyEscape();
     };
 } // ns
 #endif // guard