chore(common/core): handle deletion of markers in actions 🐞

chore(android): Update globe key help and whatsnew

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

Per review comments.

chore(common/core): additional debug tests 🐞

chore(windows): patches for Delphi 10.4

auto: increment master version to 15.0.90

Updates Keyman for Windows and Keyman Developer sources so that they
build under Delphi 10.4. No validation has been performed to ensure that
there are no other issues. The intent here is to get a baseline build
working.

Note also IMSample.vcxproj which has its WinSDK version updated for
VS2019.

feat(android/engine): Improve globe key experience

fix(common/core/web): OSK state-key management

fix(common/core/web): error from early fat-finger termination due to OS interruptions

feat(web): Update addKeyboards to return Promise

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

Merge branch 'chore/common/core/debug-additional-tests' into chore/common/core/5488-delete-markers-reliably

Also introduce a specific enum for backspace type rather than
inappropriately using the action item type enum.

Fixes #5488.

This updates Keyman Core, corresponding tests, and Keyman Engine for
Linux to support deletion of markers through an action, ensuring that
the action queue does not desynchronize with the context.

auto: increment master version to 15.0.89

chore(common/core): Implement capsAlwaysOff system store 🚧

This change implements the core part in a way that makes the tests
pass. This still needs corresponding changes in the engine.

refactor(web): delayed OSK initialization 🍕

refactor(web): osk inner-frame abstraction (help text vs std OSK) 🍕

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