This Patch adds a new item in the interactive spotlight menu.

The reason i did this was because every other light property with a visual cue in the 3dview, except the spot blend, already had an interactive menu item.

To maintain some logical order i had to change some menu indices.

Changed order is:

1) Spot Size -> Spot Size
2) Distance -> Spot Blend
3) Clip Start -> Distance
4) Clip End -> Clip Start
5) (nothing) -> Clip End