On Windows 7, we will no longer attempt to canonicalize BCP 47 tags in
the same was as on later OS versions, because there appear to be some
significant differences in how they work, for example, zh-CN is not
converted to zh-Hans-CN on Windows 7, whereas it is on Windows 10.
This commit also refreshes the `KLog` unit which is useful for debugging
these types of scenarios.
Ensures we get a canonical tag per langtags.json as far as we possibly
can. This is a breaking change for the compiler as tags which were
formerly regarded as canonical are no longer regarded that way. This
mostly relates to script subtag but a secondary bug meant that some
other tags would have lost data in the canonicalization process
(because we did a lookup based only on the language subtag previously,
which is a no-no).
See keymanapp/keyboards#1452 for related work.
Fixes#4343.
This patch makes all language codes from the langtags.json dataset
visible through the Add Language dialog. This avoids situations where
an incomplete code such as "cmo" can result in an error (a script is
required for "cmo" as it is written in either Latn or Khmr).
Relates to #3561.
If a keyboard has languages installed under one of the four transient
language profiles, then we need to jump through some additional hoops to
upgrade it to the 14.0 model.
This does not yet handle all scenarios around installed but non-loaded
keyboards.
