HaikuDepot : Improve Language Code Handling

HDS is soon going to be enhanced to deal with more than
just the two-character ISO language codes that it
currently supports. The logic in HD is currently expecting
that HDS will only supply these two character codes. This
change is about making adjustments to be able to cater to
any ICU language IDs from HDS.

The naming in HDS is still going to continue to use the
terminology that it currently does; it will call the
identifier for a language a "natural language code". The
HD source will instead reflect the nomenclature of ICU
and call the same thing a language ID.

Change-Id: Ib138c2e3b7b667edf15cd497c2f710f80b3c29f8
Reviewed-on: https://review.haiku-os.org/c/haiku/+/7424
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Niels Sascha Reedijk <niels.reedijk@gmail.com>

HaikuDepot: Lists; Categories + Stabilities

Remove use of custom list class where it is not
really required in the area of Categories. Also
introduces stabilities relayed over from the
Server and used in the HD user interface instead
of being hard-coded.

Relates To #15534

Change-Id: Ib71141e71cd4a0b4882827e2e59b62072de01b4b
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3331
Reviewed-by: Jérôme Duval <jerome.duval@gmail.com>

HaikuDepot: Load Languages from HDS

The HaikuDepot application has, thus far had its
own hard-coded list of languages that the user is
able to choose when (a) creating a new account or
(b) creating a user-rating. This change will mean
that those languages are loaded from the HDS
server dynamically and in this way the user can
choose from the full list. There have also been
improvements to the way in which the languages are
displayed in the menu as well.

Change-Id: If7cb7b87f348ca59d503d276a22444e72d0e6168
Reviewed-on: https://review.haiku-os.org/c/1425
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

HaikuDepot : User-Rating / Star Selection Fix

This commit resolves a problem where the user-rating
is able to specify a rating (how many stars) or not.
The behaviour was not properly honouring the checkbox
to specify if the rating was to be used or not.

Change-Id: I01067bf899e1d5beab1474a197c5698166b9f582
Reviewed-on: https://review.haiku-os.org/600
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

HaikuDepot: Multiple improvements for user-ratings

* Display of the user-ratings listing improved
* When a user-rating is created / edited, the pkg is updated
* Creation date of the user-rating is unpacked shown
* Ability to create a user-rating with a comment, but no numerical rating
* Stars display show grey if no numerical rating present
* Improvements to error reporting when problem arise
* Parsing of the 'revision' field of the version working
* Removed debug logging for the text engine
* Other minor tweaks

Change-Id: I99f881ab1426641ef4177eec2d3bcacc7cb74e95

HaikuDepot: Implemented creating/updating ratings...

... from the RatePackageWindow. It does not work yet, the errors
are reported. To be investigated...

HaikuDepot: Display check box to deactivate rating

... if a rating already exists for the given package and version.

HaikuDepot: Now retrives existing rating for a package...

... if there is one and fills the RatePackageWindow UI accordingly.
This will allow a user to edit her earlier rating for a given package.
The button labels will need to be adjusted. Uploading a rating still not
implemented.

HaikuDepot: Allow to set the rating comment's language.

HaikuDepot: Add actual rating to RatePackageWindow.

Implemented SetRatingView based on RatingView. It previews the rating
when hovering and makes it permanent when clicked.

HaikuDepot: Organized source into sub-folders

HaikuDepot: Implemented creating/updating ratings...

... from the RatePackageWindow. It does not work yet, the errors
are reported. To be investigated...

HaikuDepot: Display check box to deactivate rating

... if a rating already exists for the given package and version.

HaikuDepot: Now retrives existing rating for a package...

... if there is one and fills the RatePackageWindow UI accordingly.
This will allow a user to edit her earlier rating for a given package.
The button labels will need to be adjusted. Uploading a rating still not
implemented.

HaikuDepot: Allow to set the rating comment's language.

HaikuDepot: Add actual rating to RatePackageWindow.

Implemented SetRatingView based on RatingView. It previews the rating
when hovering and makes it permanent when clicked.

HaikuDepot: Organized source into sub-folders