Component UI Improvments

A bunch of miscellaneous cleanups and improvements to component interface

• cleanup components UI + make component properties collapsible
• add nav-mesh, uv-scroll, and waypoint as default components
• fix exporting vec properties
• add support for enum properties
• add support for image properties
• support for description, subType, and unit annotation on properties
• support for grouping components into categories
• fix python warnings about "attributes" usage on dynamic classes