Optimized List Queries by Xon 2.12.0

• Improve how the 'node type' cache is extended to be more resilient.

• Extend node list loading code to reduce query count on viewing the forum list or a forum with child nodes.
  • Removes 2-4 queries depending on the number of unique node types (forum/link forum/category/page/etc) in the node list.
  • Avoids sending a potentially huge list of node ids into MySQL queries for node type's extra content.

• Add resource icon
• Cleanup phrasing and allow "-1" for various thresholds to actually disable things.
• Support extending member list.

• Better Thread List Page Threshold actually refer to pages instead of individual item counts