Issue: 🐛Bug report | Crash if node selected when modifying primitive mesh

[stevenlabelle]

Description: FBS will crash if a node is selected on a primitive (non-editable mesh) when the mesh parameters are changed.
Version: Dev version 2.7.0.5625a215a

To reproduce:

1. Open a new model and create a primitive mesh (e.g., cube).
2. Generate a primitive mesh.
3. Select a node on the mesh.
4. Modify the parameters for the mesh (Nx, Ny, etc.) then click apply. The model will crash.

[stevenlabelle]

This also occurs for element, face, and edge selections.