DB/Items: Fix some startup errors

By Fateswhisper, updates #11587
DB/Quest: Fix 3 quests texts

By MrSmite, closes #11585, closes #11582
Core/MMAPS: Fix invisible wall issue in MMAPS.

Fix invisible wall issues in MMAPS caused by tile connections not being extracted correctly.
This reverts aa645683b8b25bfb35cb977678daf5c56c1531e6 and restores an old version of recastnavigation, most likely https://github.com/memononen/recastnavigation/commit/1be9de72d87dcfdecf6bea30f5461745f7d7afe6 .

Re-extracting MMAPS is required.
Core/PlayerDump: fix mail items and gifts export
Merge https://github.com/TrinityCore/TrinityCore