Drag & Drop NPCs & better Drag & Drop features

* Fix bug in container scaling.
* Add NPC management, including adding automatic rogue table completion with random level mods, and optional random equipment and magic items added to items carried.
* Added weapon proficiencies for Creatures & NPCs, default to Proficient.
* Added Extra Strength calculation for strength of 18 (if specified for NPC - not class dependent).
* Corrected allocation of Spell Menu action button so all those able to cast spells have it.
* Allow query results in weapon, armour & item specifications for Creatures/NPCs.

Author: DameryDad