Creating a new tool storage in the 'IGT Navigation Tool Manager' view leads to a crash when 'IGT Navigation Tool Calibration' view has been closed before.
Steps to reproduce:
* Start workbench
* Open 'IGT Navigation Tool Calibration' view
* Open 'IGT Navigation Tool Manager' view
* Close 'IGT Navigation Tool Calibration'
* Click 'Create New' button in 'IGT Navigation Tool Manager' view
* Fill in a name
* Click 'OK'
=> Workbench crashes