3.14.1
Update Uzbek@cyrillic translation
tests: Remove unused code in gtk-reftest

https://bugzilla.gnome.org/show_bug.cgi?id=737123
languages: Use a more broadly compatible locale codeset suffix

At least OpenBSD's libc doesn't accept 'utf8' as a locale codeset
suffix but does accept 'UTF-8'. Since GNU libc accepts both suffixes
let's use the one which works on a broader set of systems.

Thanks to Stefan Sperling and Antoine Jacoutot.

https://bugzilla.gnome.org/show_bug.cgi?id=710412
3.15.1
gnome-rr: drop gdkx include

it's not used.
gnome-bg: drop unused APIs

They aren't used, and don't work on wayland systems anyway.

https://bugzilla.gnome.org/show_bug.cgi?id=739463
Revert "gnome-bg: drop unused APIs"

This reverts commit 786336cc7cfaa8e4a0acafe5b9868950e538b740.
tests: Remove unused JSON related variable
tests: Turn the tests into installed tests

https://bugzilla.gnome.org/show_bug.cgi?id=737140
bg-slide-show: Fix annotation
gnome-rr: Adding DSI as a builtin display connector

Add DSI to the output name in
_gnome_rr_output_name_is_builtin_display() to enable screen
rotation on Dell Venue 8 Pro.

https://bugzilla.gnome.org/show_bug.cgi?id=740289
thumbnail: Clean up path generation code

Put the path calculation code in one spot.

https://bugzilla.gnome.org/show_bug.cgi?id=684026
thumbnail: Move thumbnail generation/saving to a few helper functions

Another cleanup in preparation for a new "simple" thumbnail API.

https://bugzilla.gnome.org/show_bug.cgi?id=684026
Updated Vietnamese translation

Signed-off-by: Trần Ngọc Quân <vnwildman@gmail.com>
3.15.2
thumbnail: Don't fail after successfully creating the cache directory

g_mkdir_with_parents returns 0 on success or if the directory already
exists, which caused the code to go into the failure path rather than
generating the thumbnail.

https://bugzilla.gnome.org/show_bug.cgi?id=684026
thumbnail: Include the filename in the thumbnail path

thumbnail_path did not include the actual filename in its result after
calculating it. This breaks things in save_thumbnail which assumes
receiving a file path rather than a directory path.

See original code before clean ups at:
https://git.gnome.org/browse/gnome-desktop/tree/libgnome-desktop/gnome-desktop-thumbnail.c?id=f2d25fa7d6cdaba03679f0fc0921fc5f81bd3944#n1060

https://bugzilla.gnome.org/show_bug.cgi?id=684026
3.15.2.1
build: Post-release version bump