Better property categorization in Gaia; Improved Depth of Field!

New property categorization feature (see right hand side) thanks to @Happypig375!

Depth of Field improvements!

Overview of Changes -

• Add type constraints to generic Has and Is methods.
• Only setting Fixture.IsSensor when it's true to avoid a cascade of undesired interal behavior when it's false.
• Removed unusable BodyProperties.Awake flag.
• Did facet and entity dispatcher TODOs by using reflection instead of hard-coding ctors.
• Reduced duplication of target framework specification strings.
• Make Box2D.NET types debuggable
• Fixed ImSim group 'renaming' bug in Gaia code.
• Categorize by facet and dispatcher name instead of "Xtension Properties'.
• Fixed #1253.
• Fixed #1228.
• Fixed #1254.
• Added modal guard to fix #1255.
• Fixed distance fog color not showing up in linear fog setting.
• Reduced default ssvf steps and ssao sample count to save a bit of perf.
• Made ssvf work without shadows.
• Fixed #1258.
• Fixed unintended compression of sky box faces.
• Attempting to reduce allocation in entity hierarchy.
• Fixed outdated tiff paths.
• Updated Jolt wrapper.
• Fixed #1261.
• Fixed #1259.
• Improved DOF blur with off-geometry blurring.

Full Changelog: v19.10.0...v19.11.0