Core/MapScripts: Use proper source unit in SCRIPT_COMMAND_TALK

Closes #13161
Core/MapScripts: Use proper enum value for boss whisper in SCRIPT_COMMAND_TALK
Core/Grids: Replace some magic numbers with constants

(P.S.: That's why! @cs_misc.cpp)
DB/Misc: Medical Supplies / Sunhawk Reclaimer

* Spawn Missing Medical Supplies http://www.wowhead.com/object=181898/medical-supplies
* Script Sunhawk Reclaimer
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore