Issue: 🐛Bug report | "Clear selection" for Mesh Data crashes FBS

[stevenlabelle]

Description: Using "clear selection" under the mesh data tab crashes FBS

Version: Dev Version 3.0.0.182c159d1

Steps to reproduce:

1. Open a model with mesh data assigned to an object.
2. In the left panel select a mesh data object.
3. Click the "clear selection" x button.
4. FBS will crash.

[michaelrossherron]

I looked into this, and I know what's causing the crash, but I'm not sure what the best way to go about fixing it is. Unlike most classes with selections in FEBio Studio, the mesh data classes' data are fundamentally tied to their selection; each datum corresponds to a specific element or node. So changing the selection of a mesh data object doesn't really make much sense, and we should probably disallow editing this selection for these classes altogether.

I want to talk to Steve about this issue, however, and so this will have to wait for a fix until he gets back.

[SteveMaas1978]

This issue should be fixed. Please update fbs3 and give it another try.