Greygreed Inventory Toolkit 2.5.16

- Updated suite compatibility for AutoLoot-GreyGreed 1.5.16.
- Improved Grey List bag visuals so muted items also dim GreyGreed-owned labels and frame overlays after normal bag labels render.
- Preserved the contained Grey List visual path so Blizzard-owned bag textures remain under Blizzard control.
