Before we just had API to toggle the OSK panel state. Make this API generic so the upper layers may set the state as they see fit. All callers have been updated. https://gitlab.gnome.org/GNOME/mutter/merge_requests/432
The order and way include macros were structured was chaotic, with no real common thread between files. Try to tidy up the mess with some common scheme, to make things look less messy.
It is superseded by zwp_text_input_v3.