Missing NPC message.

Patch by: @Pandragon
Minor fix for QuestState#isMemoStateEx() method.
Clean up.
Implement retail feature ride state
Fix usage potions/skills while ride

Reviewed by: @NosBit @Sdw-
Reported by: Cresceus
Thanks to: @NosBit
Fix Dimensional Rift Card use

Reported by: Berkas
Merge remote-tracking branch 'origin/master' into ertheia