Added: Ability to save and load local windlight presets.
Added: Brought back Environment Settings window.
Changed: Overhauled and simplified Environment Settings window.
Changed: Brought back old Environment Settings menu layout.
Changed: Overhauled layout of Personal Lighting window and split it into Edit Sky and Edit Water.
Changed: Overhauled layout of Daycycle, Sky and Water Edit windows.
Misc: Implemented several performance optimizations from Alchemy Viewer.