[Developer] Hide Debug Status form in Test Mode, prevents uninitialised data errors

[Developer] Improve support for BCP 47 in Package Editor

[Android] Improve intent-filter 

Fixes #885. Fixes #891. Canonicalizes, as far as possible, new language IDs as keyboards added to package

[Developer] Prevents a crash when Keyman Developer attempts to load an invalid project file.

Fixes sillsdev/keyman-issues#5568. Prevents a crash when Keyman Developer attempts to load an invalid project file.

[Developer] Fix for crash in Developer restarting regression test batch half-way through the batch.

Fixes sillsdev/keyman-issues#5557. Hide Debug Status form in Test Mode, prevents uninitialised data errors.

[Developer] For new keyboard layouts, touch layout files will have .keyman-touch-layout extension

[Windows] Incorrect icons caused by lookup against non-installed language profile.

Fixes sillsdev/keyman-issues#5411. Crash in Developer restarting regression test batch half-way through the batch.

Fixes #902

Update the intent-filter for file scheme (based on BloomReader's [AndroidManifest.xml](https://github.com/BloomBooks/BloomReader/blob/master/app/src/main/AndroidManifest.xml))

[Developer] The debugger should check that build succeeded before attempting to start.

[Mac] Prevented crash in eventTapFunction processing "out of band" event

[Developer] Make longpress slash darker in touch layout editor

[Windows] Canonicalize and complete language tags during keyboard installation and when adding languages to keyboards via Keyman Configuration

Fixes #886. Fixes #887. BCP 47 tags will now be canonicalized and scripts applied where possible and needed, automatically, during keyboard installation

1) Enable/disable event tap depending on whether Keyman is the active IM; 2) Made code dealing with keeping track of activating/deactivating servers thread-safe; 3) Improved clean-up when event tap cannot be re-enabled; 4) Improved and cleaned up some comments and code aesthetics.

[Mac] #782 - Improvements to TestInput to illustrate issues with InDesign

When a special event comes in indicating the event tap has been disabled by timeout or by the user, we attempt to re-enable it. Otherwise, use fallback logic.

Update history.md for all release tags on all platforms as of today

Also minor formatting change in InDesign instructions.

[ios] unused calls

[Mac] #769 Added error reporting via Fabric/Crashlytics

[iOS] Fixes accidental event interrupts due to window.location.hash use.