QmlDebugger: Insert locals correctly

The watchhandler needs to be reset for locals before
inserting the values of a new frame. Also the DebuggerTooltipManager
needs to be notified. The values of the locals in the
LocalsAndExpressions window should be editable.

Task-number: QTCREATORBUG-7992
Change-Id: I556e23b408db09b510f1f2bc350ff55187ec87c2
Reviewed-by: Robert Loehning <robert.loehning@digia.com>
Reviewed-by: Christiaan Janssen <christiaan.janssen@digia.com>

src/plugins/debugger/qml/baseqmldebuggerclient.h

@@ -91,6 +91,7 @@ public:
 
 signals:
     void newStatus(QmlDebug::ClientStatus status);
+    void stackFrameCompleted();
 
 protected:
     virtual void statusChanged(QmlDebug::ClientStatus status);