Fix crash when resizing with no splitters shown
Fix order of loading gettext catalogs

Load the "poedit" catalog as the last one, because it should take
priority over wxstd translations.
Handle language codes with UN region code properly

Instead of disallowing such locales completely in the list of languages
(as 90aed6cd did), allow them in the list and properly validate them in
the regex. Apparenly, es_419 in particular is commonly used with
gettext, so this is the right thing to do.
Fix crowdin PO names mapping

Some translation (pt, zh_CN) were accidentally not updated due to the
use of %two_letters_code%, which could overlap for multiple
translations.  use %locale_with_understore% instead, with custom mapping
to loose the country part where it makes no sense.  Crowdin sure doesn't
make doing the right thing easy...
Deduplicate OS X installed .lproj files

Due to various bugs in scripts, some of the lproj directories were
created in multiple variants for some languages (e.g.  zh_Hans and
zh-Hans, pt and pt_PT).  Clean this up, make sure there's only one lproj
per language.  Change copy-translations.sh to use the correct form of _
instead of - as the separator.
Update translations from Crowdin
Check updates downloaded from Crowdin for errors

Add msgfmt error checking to scripts/update-translations-from-crowdin.sh
because Crowdin, weirdly, doesn't check not even the basics.
Increase version to 1.6.19, update NEWS
Import gettext-0.19.3
Merge branch 'vendor/gettext' into gettext-0.19.3
Update Gettext.Tools nuget package to 0.19.3
Merge branch 'gettext-0.19.3' into stable