feat(core): ldml marker normalization fix 🙀

- document per code review

For: #10516

auto: increment master version to 17.0.254

fix(web): touch-layout fontsize property use ⛲

feat(web): key-event rule processing unit tests for mnemonic, KMW 1.0 keyboards 🧓

feat(web): keystroke pre-processing unit tests 🧓

- decomp the 'glued' char before storing in map

For: #10516

auto: increment master version to 17.0.253

fix(android/engine): Fix OSK widths

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

chore(developer): `--enable-source-maps` parameter for kmc wrapper

fix(common): ldml: fix typo in kmc error message 🙀

auto: increment master version to 17.0.252

chore(developer): upgrade ngrok to v3

Fixes #10487.

In Keyman Developer's wrapper of kmc, we now accept
`--enable-source-maps` as the first parameter to pass to kmc. We do not
enable source maps by default because they have a performance penalty.

auto: increment master version to 17.0.251

- stray dot in the pathname, it's not a regex!

feat(developer): marker normalization in .ts 🙀 

fix(android/engine): Skip final globe key action