Add LightSourcesWizardPlus

[marsmaantje]

Added LightSourcesWizardPlus.

Its an improvement from the default one in multiple ways:

1. Every action is undoable
2. There is a distinction between multiplying and setting
3. No limit to the float value you input (limit was 0 to 8, now 0 to Infinity)
4. Added ability to filter by tag or by color (within provided variance)

[Frozenreflex]

There's a couple of styling issues and other miscellaneous things I would change, but overall it seems fine to push, I'll fix it up whenever I get the time and motivation to.