[TH] Nodes for grid, custom styling, and custom icons

xF2 Add-on [TH] Nodes for grid, custom styling, and custom icons 1.0.7 Patch Level 1

Changes:
- Added an option to revert node styling on the node layout & styling page.
Enhancements:
  • Add support for node icons to work for sub forums on forum list.
  • Adds ability to copy style from one node to another.
  • Option added for create thread trigger to go straight to create thread page (and not modal).
  • Added styling to show which nodes have styling and which do not.
Enhancements:
  • Add support for icons in headers
Bugs fixed:
  • Current style node inheritance should have priority over parent style node inheritance bug
  • Node grid separators not changing layout if depth > 1
  • Undefined index: thnodes_customColors
  • Node grid and node styling not working on watched forums