feat(developer): add Clear All button to icon editor

feat(developer): check filename case consistency when compiling keyboard

feat(developer): hint on unreachable code

fix(web): rely on caller for unmatched keys

chore(common): Update in-app help versions to 15.0

chore(android): Document minimum required version of Chrome

fix(developer): improves More Help link for icon tool

Fixes #2749.

Adds a Clear All button which does the same as Edit/Clear Selection.

At the same time, fixes the Clear code for transparent background
colours; previously, clear all with transparent background gave a black
fill.

Fixes #2750.

This tweaks the More Help link to open the correct part of the Keyboard
Editor help page. Goes together with keymanapp/help.keyman.com#526.

The context help data needs a consolidated rewrite. This does not
attempt to touch that, nor does it attempt to add more contextual help
links for any other part of the Developer IDE. That is work for another
day...

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

auto: increment beta version to 15.0.227

feat(linux): Allow to run ibus tests on Wayland 🛤️

Fixes #6005.

If a key has no default behavior, and the expectation is to trigger the
key default, then set the output behavior to null, so that the caller
will do the action.

This fixes a regression in #5553, which handled the situation where a
rule was triggered but then default output was expected (common example
is final sigma transform only when a word is finished).

The regression resulted in suggestions rotating unexpectedly when
pressing a modifier key.

fix(web): track stateKeys changes with layer changes

auto: increment beta version to 15.0.226

fix(oem/fv/ios): maintain consistent keyboard state between Keyman Engine and FV app

feat(developer): keep Virtual Key Identifier dialog open on Insert

fix(ios): reset context when osk is resized

This change modifies the `run-tests.sh` script so that tests
run on both Wayland (if supported) and X11 unless
`--no-wayland` or `--no-x11` is specified.

This change also adds the new argument `--wayland` to the
`ibus-keyman-tests` executable which runs the tests under
Wayland.

Note that running Wayland tests is only possible in Ubuntu 21.10+
because it requires a version of `mutter` that supports the
headless option which got added in mutter 40.

fix(android/engine): Use fixed sizes for preview keys

Fixes #6405.

If the layer is reset to default, e.g. by switching fields, then the
state key bitmask was not always kept in sync with the layer change.

fix(developer): Add Wordlist button now copies into source folder

fix(web): track load error detail

Fixes #5063.

It can be useful to be able to insert multiple keys into the active
keyboard source file. With this tweak, the dialog no longer closes with
the Insert button, only with the Close button.

maintain active keyboard list and rebuild keyboard list in Keyman Engine whenever a keyboard is added or removed