QmlDebugger: user input on watches

Reviewed-by: hjk

src/plugins/debugger/gdb/gdbengine.h

@@ -110,6 +110,7 @@ private: ////////// General Interface //////////
     virtual void runEngine();
 
     virtual unsigned debuggerCapabilities() const;
+    virtual bool canWatchWidgets() const;
     virtual void detachDebugger();
     virtual void shutdownEngine();
     virtual void shutdownInferior();