Log Message:
Update to 2.5.31:

* Bug fixes:
- fvwm-convert-2.6:  Don't double-up comma separated options to
  conditional commands if they're already delimited by commas.
- Correctly report a window's height and width if the window has
  incomplete resize increment set.
- Maintain any State hints on a window when used with WindowStyle.
- FvwmIconMan now correctly handles sticky windows.