Bug 112256

Summary of the patch
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* changed all spacings to proper hig numbers, changed all frames to
the new "whacky packy" style frames, with vboxes and hboxes

* added colons where appropriate to GtkLabels

* removed all seperators from dialog boxes

* changed "joinsave" dialog quite a bit - removed title, changed
button order, removed the icon from "don't save" button, changed text
inside dialog to divide into primary and secondary text, changed icon
to Warning instead of Question

* removed unnecessary "inline help" - if an admin doesn't know what
this stuff is already, s/he won't know learn enough to properly use
the tool from the 2 sentence help provided them in the middle of the
authconfig window. ;)


possible b0rkage due to this change:
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not sure why, but winbind used to be hidden on my system when the
using old, unmodified config dialog, but now it appears.  Also, when I
click the button for configuring winbind, nothing happens...

requests:
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* How about a Help button? :)

* In further changes, I'd like to merge the Authentication and User
Info tabs, since some of them otherwise appear twice (a Bad Thing,
IMHO), and again, if an admin doesn't know the difference between some
of these options, s/he's already lost - dividing them up won't help any.

* Could we grey out/disable the "configure" buttons for stuff that's
not enabled in the first place?  ie: if SMB auth isn't checked, the
button should be greyed out.  Doing this would help with the above
mentioned further layout changes...