debugger: Fix state of breakpoint marker when disabling it using the breakpoint view

There was not updated cached state within the marker object.

Reviewed-by: Friedemann Kleint

Task: QTCREATORBUG-2544

src/plugins/debugger/breakhandler.cpp

@@ -584,6 +584,7 @@ void BreakHandler::toggleBreakpointEnabled(BreakpointData *data)
         m_enabled.removeAll(data);
         m_disabled.append(data);
     }
+    data->removeMarker(); // Force icon update.
     data->updateMarker();
     emit layoutChanged();
     m_engine->attemptBreakpointSynchronization();