Update translations from Transifex:

 - Galician
 - German
 - Japanese
 - Malay
 - Romanian
 - Spanish
 - Swedish
Update files for 1.7.3
Set MPC_NIGHTLY_RELEASE to 1.
Track selection: Don't override splitter choice if all tracks have the same priority.

Patch based on Kasper93's work.
Properties dialog: List tracks instead of pins when possible.

Splitters often don't output one pin per track so the streams list could be quite incomplete.
Subtitle render: Fix an off-by-one error when painting the overlay.

This error introduced in 3244957f4563575d22bf109de27a703558611b19 could cause artifacts to appear when using karaoke effects.

This commit fixes #2773.
Fix image saving for streams with characters not supported in path names.

This commit fixes #4011.
OSD: The bounding rectangle was too small if "&" appeared in the text.
OSD: Sanitize the positioning of the text and its frame.

Displaying an identical message on top left or top right resulted in different frame size. Also improve the behavior when the text is too big to be displayed entirely.
Subtitle renderer: Fix parsing of some animated transform tags.

\t(<t1>,<t2>,<accel>,<style modifiers>) tags were wrongly parsed because of a typo: <t1> was used as <accel>.
Subtitle renderer: Fix a crash on malformed animated transforms.

\t tags with no parameters led to a crash.

This commit fixes #4013.
Update translations from Transifex:

 - Galician
 - Hebrew
 - Japanese
 - Romanian
 - Ukrainian
 - Vietnamese
Update dialog: Fix incorrect version info when using some translations.

Belarusian, Slovenian and Russian translations were affected after 607c1f53de95e572ff63b4e293b31650d92892df.

This commit fixes #4020.
Translations: Fix some typos involving printf-like placeholders.
Updated LAV Filters to 0.60.1-27-d5e7cf2 (custom build based on 0.60.1-22-b8a8b83)

Important changes:
 - Updated ffmpeg library and QuickSync decoder.
 - LAV Audio: Improve error recovery on slightly corrupted audio streams.
 - LAV Video: Fix a rare crash that could occur for high resolutions.
 - Support BT.2020 colormatrix.
Revert "Subtitle renderer: Fix parsing of some animated transform tags."

I can't read...

This reverts commit 3cca9896ce2218d3c7169e54673d18e9c8010440 and fixes #4025.
Subtitle renderer: Fix a typo introduced in 3244957f4563575d22bf109de27a703558611b19.

It had no effect on the output but a slightly slower code path was used.
Subtitle renderer fix: shadow was not drawn when border was very thin.

The issue was introduced in 19fb30b3effa1a8d221240ef42e47aaf8bf9e495.

This commit fixes #2588.
VMR-7 renderless: subtitles were not displayed except in fullscreen.

This issue was introduced in aa4a1acb57fc28fd464942d48b5f9987d88df82f.
VMR-9 renderless: Always try to update the subtitle displayed when seeking while paused.

Ignore invalid timestamps since we use the one from the pin hook anyway.

VMR-7 renderless seemed unaffected by that issue but make the code consistent anyway.

Refs: ticket #3763.