Correct wxTranslations docs: CWD is not searched.

The documentation incorrectly stated that the current working directory
is searched for translations.  This isn't the case (and wouldn't be a
good thing to do).

See #12498.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74439 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Improve translations lookup logging.

Log match directory in GetAvailableTranslations().  Log search paths
with one directory per line, for better readability when debugging.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74440 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Don't look for catalogs in AddCatalogLookupPathPrefix() path directly.

Previously, the prefix directory itself for searched for catalogs, in
addition to prefix/lang/LC_MESSAGES and prefix/lang.  This never made
much sense, because only one catalog could be in such place, instead of
multiple catalogs for more languages.  It also prevented successful
identification of catalog's language and didn't work with
GetAvailableLanguages().

Remove this misfeature and update the documentation accordingly.  Update
OS X-specific code so that it continues to work (it previously depended
on this behavior).  As a side effect, *.lproj directories are now
recognized in all search prefixes, not just in Resources.

See #12498, #15253.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74441 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Clarify .mo deployment in i18n overview.

Fixes #15253.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74442 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775