[Web] Cherry-picks OSK layer logic fix

[LMLayer] Start process of merging LMLayer (predictive text) code

[Web] alignInputs() API cherry-pick

[meta] 12.0 alpha seed

[linux] forward backspace

[linux] install kmx to ibus when installing kmp

move get_metadata to kmpmetadata.py
some ibus utility functions for un/install, restart
and change keyboard

[Common] Refactor options storage and lookup

Works around odd embedded iOS issue.

Since option was not assigned to non temporary storage the string was deleted and caused the API to return freed memory.

[iOS] Subkey combining diacritic display fix

[Common] Common refactor actions options machinery and options API onto state

[Web, iOS, Android] Undisplayed diacritic fix

[Web] Keyboard text auto-scaling

[linux] Linux options

[wip] [Common] refactor processor init