Description of bright_bit is incorrect

[pvanlaet]

(on portal)
Current description: "The bit that indicates the brightest part of the day. -1 when not in use."
This is not correct. Also the name is not ideal.
Better description: "The bit that indicates when the bright_offset is reached. -1 when not in use."

Improvement for "bright_offset" description: "The offset (in minutes) after sunrise and before sunset (decided by horizon_bit) on which the bright_bit should be set."