fix(linux): Fix ibus-keyman integration tests 🎫

chore(developer): tweak language metadata message

chore(windows): Consolidate documentation for Windows devboxes

Co-authored-by: Darcy Wong <darcy_wong@sil.org>

feat(common/core/desktop): Allow preserved key support

Co-authored-by: Eberhard Beilharz <ermshiperete@users.noreply.github.com>

Also update issue comment for future removal of winows processor code

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

The pkeys was using the wrong counter as a index
in the map check therefore matching the incorrect key

Relates to https://community.software.sil.org/t/why-does-the-details-tab-in-keyman-developer-still-refer-to-keyman-10/5612/3

fix(web): restore `dragEnd` function 🔥

Relates to #5947.

I resolved a merge conflict in #5947 in the wrong direction and
accidentally deleted the `dragEnd` function. This restores it.

chore(developer): move kcframe into its own folder

fix(developer): render OSK nicely on touch devices

fix(web): support saving focus for custom OSK interactions

fix(web): improve keyboard switch performance

fix(web): remove obsolete popupBaseTarget

auto: increment master version to 15.0.157

fix(windows): fix loadkeyboardoptions core memory error

auto: increment master version to 15.0.156

Previously we overwrote our test data, so we basically ran the same
test repeatedly under different names.

Properly running them showed some failures which this change also
fixes or skips.