MCP: Service refusal filtering

From the MCP's readme:

This option allows the special 'Service Refusal' topic to be filtered for each individual service an NPC provides, instead of refusing all services or none. This allows more scriptable service limits like training limits, rank based access, or quests/bribes for additional services.

The 'Choice' dialogue filtering function indicates service type for the service refusal topic:

Barter 1

Repair 2

Spells 3

Training 4

Travel 5

Spellmaking 6

Enchanting 7