Color transient selections differently
Purple highlighted geometry in aeva indicates two different things:
- when an item is selected in the resource panel, it's geometry is highlighted purple.
- when a selection is created with operations on the selection toolbar, or with paraview selection tools, it is transient, and can be converted to a group with Duplicate. It's also colored purple.
This causes confusion, because the first kind of selection can't be modified by the paraview selection tools - it must be made into a transient selection using the Select-All-Cells operation. We should consider coloring the transient selection differently.