This change implements a commit queue which allows to control the
order of the output. This ensures that any backspace we generate
will be processed before the character we're adding.

Requires changes in ibus (surrounding text fix (see #7072) and
prefilter change)

Fixes #1489, #4028, #4029, #4030, #4505, #5510, #6639

auto: increment master version to 16.0.78

chore(web): unit test polishing pass

fix(web): possible error on change of context to a contextEditable

auto: increment master version to 16.0.77

chore(linux): Cleanup unnecessary surrogate check

auto: increment master version to 16.0.76

chore(common): builder script maintenance

auto: increment master version to 16.0.75

Previously `process_unicode_char_action` checked for
`action_item->character` being a surrogate. This should never happen
because `action_item->character` is a 32-bit character. This change
removes the unnecessary check and the `keyman->firstsurrogate` field.

Fixes #6385.

fix(android/engine): Dismiss subkeys on multi-touch

chore(android/engine): Display Toast notifications on Sentry errors

auto: increment master version to 16.0.74

fix(developer): handle invalid kps xml when loading project view

auto: increment master version to 16.0.73

refactor(common): Split builder utilities to separate script

Co-authored-by: Marc Durdin <marc@durdin.net>

fix(web): Only unhighlight suggestion if there's a pending one

auto: increment master version to 16.0.72

fix(common/web): mock deadkey handling after rules manipulating context 📴

fix(web): Update spacebar caption when refreshing layout