Debugger: Disable "Start debugging" when attaching/starting remote

Directly enable project explorer actions.
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>

src/plugins/debugger/debuggerplugin.h

@@ -143,6 +143,7 @@ private:
     QAction *m_attachExternalAction;
     QAction *m_attachCoreAction;
     QAction *m_detachAction;
+    QAction *m_peStartDebuggingAction;
 };
 
 } // namespace Internal