Core/Misc: Remove remaining COMPILER_HAS_CPP11_SUPPORT related macros
Merge pull request #11968 from Dehravor/cpp11

Core/Misc: Remove remaining COMPILER_HAS_CPP11_SUPPORT related macros
Core/Misc: Fix exploit

Fix exploit that allowed to duplicate stackable splitable items. If the item that cast the spell can't be found anymore, the spell is cancelled.

Fixes https://github.com/TrinityCore/TrinityCore/issues/11977
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore