Update clipping rects in ui_layout_system

[ickshonpe]

Objective

Perform UI clipping updates during the walk to update the rest of the layout properties.

Solution

• Removed update_clipping_system and renamed the update module to update_target_cameras.
• Migrated the queries and clipping update logic from update_clipping_systems to the update_uinode_geometry_recursive function in the layout module.
• Nodes with Display::None set and their descendants don't need a full update, so added a second function to layout called hide_uinodes_recursive that just walks down the tree and sets the node sizes to zero.

[ickshonpe]

I'll do some benchmarks a bit later this evening. Typically it seems to only be a ~10% improvement overall but something like a modal UI with a very deep tree that uses Display::None to hide the inactive elements you would see very large improvements.