x-ray view link causes crash when removing window
Steps to reproduce:
- Run PV 5.1.2
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Create a Wavelet
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Create 2 views (one with surface with edges representation and one with outline representation
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link the outline representation view to the surface representation view with interactive view link
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delete the linked view (i.e. the one that doesn't show the x-ray view)
This happened on a Windows machine with the PV installer.