Blender Git Loki

Unify "Hide Selected / Reveal Hidden" operator names

All edit mode related operators are now "Hide Selected / Reveal Hidden".
Before we had different variatons of them:

Hide Selection:
* MESH_OT_hide
* GPENCIL_OT_selection_opacity_toggle

Hide Selected Bones:
* ARMATURE_OT_hide

Hide:
* MBALL_OT_hide_metaelems

Hide Selected:
* CURVE_OT_hide
* PARTICLE_OT_hide
* POSE_OT_hide
* UV_OT_hide

Reveal Bones:
* ARMATURE_OT_reveal

Reveal:
* MBALL_OT_reveal_metaelems

Operators not renamed:
* Hide Curves (GRAPH_OT_hide)
* Hide (OUTLINER_OT_hide)

Note we can do a step further and mass rename them to match their UI
names. Where Reveal Hidden is Show Hidden. But for now at least they are
all unified.