[Windows] Mitigation for #1285 for 10.0 stable. Adds a mitigation for issues with installation under certain languages in Windows 10 1803 and later

[Windows] Mitigation for #1285. Adds a mitigation for issues with installation under certain languages in Windows 10 1803 and later

[Windows] Add Kannada localization (10.0 stable)

[Android] Fix crash when displaying preview key

Fixes Crashlytics  [crash report](https://console.firebase.google.com/u/0/project/kmapro-ee779/crashlytics/app/android:com.tavultesoft.kmapro/issues/5b59a79f6007d59fcdced3c2)  that's caused by trying to display the preview key when the token is null.

[Developer] Avoid a crash in package editor when compiled keyboard file is missing

[Windows] Fixup installer .wxs sources for use with WiX 3.11 (RegistryKey/@Action)

[Developer] Refactor merge keyboard info (stable)

[Windows] Fix docbook links (stable)

This is a cherry pick of PR #1158 to stable-10.0

[Android] Validate keyboard ID when downloading keyboard from Keyman cloud

[Android] Ensure keyboards list has an entry

Fixes #1120

There are some crash reports coming from `KeyboardPickerActivity.java` because the keyboards list is null (file access error). When the app tries to display the installed keyboards list, this results in the crash.

`getKeyboardsList()` already checks the existence of the `keyboards_list.dat` file, so some of that code is also redundant.

[Android] Fix crashes when input connection or package name is null

This fixes another crash on Crashlytics when the PackageActivity has a null package name.

Cleaning up the console log in #837 introduced a bug when the InputConnection in KMManager is `null` and build variant is `release`.

[Mac] #1090 - Fixed follow-on bug (when Shift is pressed)