Core/Spells: Fix custom load screen for SPELL_EFFECT_TELEPORT_UNITS
Port From (https://github.com/TrinityCore/TrinityCore/commit/29202810705804c1c5ac126195ab7bd60f56849f)
Core/Auras: Implement SPELL_AURA_DISABLE_GRAVITY
Port From (https://github.com/TrinityCore/TrinityCore/commit/765beae741ea0f332fe2ac1b4180b632462d1611)
Core/Position: Position constructor improvements
Port From (https://github.com/TrinityCore/TrinityCore/commit/d6ae7030dac388bbdf79954bd235c98209b53630)
Core/Spells: Temporarily force old flight style mounts
Port From (https://github.com/TrinityCore/TrinityCore/commit/7d36db7ede2597e032c0e8bec5eee79e7be2dd10)
Core/Auras: Reimplement SPELL_AURA_MOD_ARMOR_PENETRATION_PCT, it is back from the dead
Port From (https://github.com/TrinityCore/TrinityCore/commit/11f6576f04688fb89d97e2bbe7ae97a8b6585415)