Core/Gossip: Change max menu items to 32

Tested and a gossip menu can show max 32 items on a menu.
When sending 40 options: http://puu.sh/7rqb6.jpg
Merge pull request #11694 from Rochet2/patch-1

Core/Gossip: Change max menu items to 32
DB/SAI: The book of the Raven

By untaught, closes #11570
Core/Gossip: Add security to C++ scripted gossip options by checking guid of the object that the player is interecting with. Idea by @LilleCarl

Closes #11567
DB/SAI: No Rest For The Wicked

By MitchesD, closes #11709