Environment presets windows need help buttons and IDs

The new windows need help IDs (and thus help buttons):
*Water Presets - "water_preset"
*Sky Presets:
**Atmosphere - "sky_preset_atmosphere"
**Lighting - "sky_preset_lighting"
**Clouds - "sky_preset_clouds"
*Day Presets - "day_presets"

Since Create and Edit are basically the same, they could have the same ID. For consistency, we could add one also to the Delete Window, but honestly, it is pretty self-explanatory, so I don't think that is necessary.

NOTE: We have much of the help content for these in the existing help topics for the old Advanced Environment Editor; we just need the context IDs to hook into; content may need some minor reworking.