bauhaus: also reset to default on double click if -1 entry was selected.
whitebalance: default temperature is daylight wb
allow zoom under the "fit to screen" limit
smaller zoom steps under "fit to screen"
similarity: removed for the release.

revert this patch to bring it back (if you step up to maintain it)

Conflicts:

	src/control/jobs/control_jobs.h
	src/develop/imageop.c