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 #2185.

If a wordlist file is not in the same folder as the .model.ts file,
Keyman Developer will now ask the user if they want it copied into the
folder.

Also minor fix: if the user deletes a row in a wordlist, it marks the
file as modified.

Also very minor: the initial folder for the Add Wordlist dialog is now
the same as the .model.ts file.

This is a follow-up for #6331. We still did not have enough detail to
be able to trace the root cause of the load errors. This adds a little
more diagnostics.

feat(developer): improve Touch Layout Editor and Character Map integration

chore(web): remove unused `selectLayer` parameter

fix(common): wordbreakers package.json main field

fix(web): *Shifted* showed unshifted key cap

auto: increment beta version to 15.0.225

feat(oem/fv/ios): Dictionary Support

fix(android/engine): Clear WebView cache on package install

Fixes #4854.

Adds some intelligence to the drag + drop integration with the Touch
Layout Editor, so that we always drop a character onto a key cap, we
always drop a code onto a ID field, and can drop both character + code
together (if the key id is T_new_..., or holding Ctrl key).

Hovering over any key for 0.25 sec while dragging will select that key.
You can then continue dragging down to the subkey array and drop onto
any of those keys. Note that you do not need to hover for 0.25 sec
before you drop onto a key -- the drop operation will select the key
under the cursor when dropping.

Double-clicking will update the selected key or subkey; Ctrl will do
both the key cap and the ID.

Fixes #6258.

@keymanapp-test-bot skip

While this was done in code as a global override, probably following
Apple stylistic changes, it is better to leave this to the keyboard
developer to decide on.

auto: increment beta version to 15.0.224

fix(web): ios popup positioning and style

fix(windows): make long menus scroll in Configuration

fix(mac): invalid keyboard breaks configuration 🍒

auto: increment beta version to 15.0.223

chore(common): Update Hausa strings

fix(windows): put correct HK_ALT flag for modifier

auto: increment beta version to 15.0.222

Fixes #6098.

If the list of languages is too long to fit, the menu now dynamically
adds a scroll bar.

As a bonus:
* The language names are sorted (non-Latin scripts at bottom for now)
* `nmake install` works again (in kmshell, presence of `install` folder
  was confusing it)