Rename "Load armature..." into "Select a Preset"

This is more consistent with the Volume Rendering module.
Issue #14024
Merge branch '14024-Resources-Armatures' into armatures

* 14024-Resources-Armatures:
  Rename "Load armature..." into "Select a Preset"
Fix gcc compilation error in Armatures module
Merge branch 'armatures-gcc-compilation-errors' into armatures

* armatures-gcc-compilation-errors:
  Fix gcc compilation error in Armatures module