DB/SAI: Leading the Ancestors Home

By @dr-j fixes #10783
DB/SAI: Neltharion's Flame (12267)

By @dr-j fixes #10965
DB/SAI: Finding the Source

By @dr-j fixes #10943
DB/Update: Gibblewilt fear spam

By @Vincent-Michael fixes #10627
DB/Update: Plan B

By @untaught fixes #10787
DB/SAI: Hampering their Escape

By @untaught fixes #10780
DB/SAI: Destroying the Alters

By @untaught fixes #10841
Tools/MeshExtractor: Fixed(??????) Doodads in the terrain.
Semi-fixed WMOs in the terrain, they are wrongly rotated.
P.D: HALP
P.P.D: Entered "I don't know what i'm doing" mode.