Removed unused content.

Forgot something.

Minor fixes and improvements; cleaned up UI; added new features to the color panel; updated code organizing system.

Cleaned the UI
Made the expensive light have slightly better shadows and use less memory
Removed some unused content
Minor adjustments
Added the ability to spawn old versions from the icons for the entities

Should have fixed:
-- The issue where files not opening on the client caused the mod to not load
-- The performance issues with the expensive lights
-- The issue with the UI not working with the Dark UI mod

Made error messages even more descriptive.

Made error messages more descriptive.

Found the source of the problem and fixed it.

Almost a complete re-write!
- Added new settings for most light entities
- Added new options to the editor panel
- Added new vgui elements to make editing easier
- Removed the alternate versions as they are no longer needed
- Major optimizations
Much more.

An error occurs on startup that seems to only happen if the addon is mounted via the Steam workshop. This error does not seem to occur if the original project folder is dropped in the "addons" folder. I don't know how this is possible.

Almost a complete re-write!
- Added new settings for most light entities
- Added new options to the editor panel
- Added new vgui elements to make editing easier
- Removed the alternate versions as they are no longer needed
- Major optimizations
Much more.