We use SIL EuroLatin as fallback keyboard. If that is not installed,
previously we output an error which showed up as a toast for the user.
This change now outputs a warning instead of the error for the default
keyboard.
Also changed the KeyboardHarness test app to set a different keyoard as
default.
The default fonts (DejaVueSans.ttf and keymanweb-osk.ttf) are located in
the root directory, not the package directory. This fixes the
KeyboardHarness test app.
Also some improvements with variable and function names to better match
what they do.
On Windows the tests failed because the AppData directory doesn't yet
exist under an allowed app internal storage path. This change creates
the directory first when running tests.
Also fix `assertEquals` in that test file - the parameter ordering is
`expected, actual` but we had it the other way round which gives a
confusing message if the test fails.
This change moves to using `WebViewAssetLoader` for loading files from
the device instead of using file:// URLs. This fixes the blank keyboard
problem reported in #16096 for Android.
Also make `KMKeyboard.getKeyboardRoot()` private, and rename public
`Keyboard.getKeyboardPath()` to private `Keyboard.getKeyboardUrl()`.
Part-of: #16096
# Keyman Conventional Commit suggestions:
#
# - Link to a Sentry issue with git trailer:
# Fixes: _MODULE_-_ID_
# - Give credit to co-authors:
# Co-authored-by: _Name_ <_email_>
# - Use imperative, present tense ('attach' not 'attaches', 'attached' etc)
# - Don't include a period at the end of the title
# - Always include a blank line before trailers
# - More: https://github.com/keymanapp/keyman/wiki/Pull-Request-and-Commit-workflow-notes
- Also renamed `prefixed` and `withoutPrefix` functions to use the name
that was aliased on most cases: `toPrefixedKeyboardId` and
`toUnprefixedKeyboardId`.
- Renamed `ModelManager` class to `ModelCache` which was the name used
everywhere except in comments.
Part-of: #15292
Test-bot: skip
