ArViz Introspection: Fix error on reconnect
Fixes assertion error occurring when reconnecting:
Coin error in SoSensorManager::processTimerQueue(): Unexpected function exit. Unhandled Exception?
[13182][08:36:29.355][ArmarXGui-1585294471108][ArmarXQApplication::notify(...)]: Exception caught:
Caught armarx::LocalException:
Reason: The following expression is not true, but needs to be: 'this->layer == &layer'
(lhs = 0x7f927801c4c0, rhs = 0x7f927801b4b0)
(line 57 in operator() in /home/rkartmann/repos/RobotAPI/source/RobotAPI/gui-plugins/ArViz/LayerInfoTree.cpp)
Layer pointer is not expected to change. (LayerID: ArVizExample / ManyElements)