MAINT-2613: remove duplicate entry for "DisablePrecacheDelayAfterTeleporting", and fix a few other llsd validity problems

FIX INTL-114 translation for 9 languages of major update from CHUI (based on latest merge with viewer-development)

Integrated Nicky Dasmijn's patch to handle the unicode file paths properly.
Code reviewed, patch was clean.
Tested locally, correctly allows wearables to load where they would fail before.
Should be ready for automated build & QA.

OPEN-173 FIX FMODEx Music stutters once every few seconds (OSS patch via Latif Khalifa & Siana Gearz) - additional fix. Team City gave me the wrong MD5 for 3p-package

OPEN-173 FIX FMODEx Music stutters once every few seconds (OSS patch via Latif Khalifa & Siana Gearz)

Added checks to validate that the selection list is non-empty

Added protection for invalid / empty inventory contents

SH-4125 FIX - problem was unpredictable ordering of avatar and llviewerregion deletion. Avoid trying to send metrics when we're shutting down and it's too late anyway. Reviewed by Nyx