make addons blender versions consistent

finished

added warning "some mesh functions broken"

fixed bug where copy protected transform wasn't working; lock_rotations_4d is a bool, just copy, don't try to iterate on it.

- Check for keymap availability to suppress warning messages when running
  blender in background mode

indentation edits and copy pyrimid from contrib (where I had made some edits), removed so this wont happen again.

RNA_def_struct_ui_text: 'MESH_OT_copy_face_settings' '' description ends with a '.' !

commented out line 784 #    bpy.types.DATA_PT_texface.append(_add_tface_buttons)

[[Split portion of a mixed commit.]]

from perfection cat (sindra1961)