Remove weird layout margins, and zones for correct deactivations of
groups of groupBoxes

Please note: For whatever reason, Cocoa only allows to hide the menu bar
when we also hide the dock. On the other hand, the dock can be hidden while
the menu bar stays visible.

close #4681

Closes #7775

Reported by: Rainer Hurling
Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

This matches behavior from previous versions. "none" can forcefully
disable a module even if strict mode is NOT enabled.

Synchronization will not be so good (as with S/PDIF), but audio will
still work. Anyway, this should hardly ever happen since the ugly
resampler supports all linear formats.

In fact, the rates may be identical. Resampling might be used only to
compensate accidental drift. (We could also remove channel and format
checks.)

Reported-by: Aliz Hammond

FT_Face.family_name can be NULL for embedded fonts.

See also http://www.freetype.org/freetype2/docs/reference/ft2-base_interface.html#FT_FaceRec

This is really crappy, but it's as good as I can make it with such a
dumb interface.

This enable more uses of optimized format conversion plugins.
(Currently the generic format converter hides indirect conversions.)