To reproduce:
1. Open Workbench with ChartExample-plugin activated
2. Open ChartExample plugin
3. Click //Add data// to add simple xy-data
4. Click //Update data//
5. Workbench crashes in:
- `void QmitkChartWidget::Impl::ClearData()` -> `m_WebChannel->deregisterObject(xyData.get());`
Error message is:
(IMPORTANT) core.mod.apputil.baseApp ERROR: ASSERT: "!objectName.isEmpty()" in file qmetaobjectpublisher.cpp, line 442