More UI Change for GDM

[Brian Cameron <Brian Cameron Sun COM>]

Once again, I realize its past the UI freeze data for GNOME, but there
is one more UI change that I think should be considered for GNOME 2.12.
Calum is in the middle of doing a UI review for GDM, which I was hoping
would get done in time for me to get these changes in before the freeze.
He still isn't done with the review, but I'd like to address the issues
that he highlighted:

1) Remove mnemonics from the tabs in gdmsetup, since you aren't supposed
   to use them according to the HIG.

2) Change "Always disallow TCP connections to X server (disables all
   remote connections)" checkbox label to "Disallow TCP connections to
   Xserver (disabls xforwarding, but doesn not affect XDMCP".  Calum
   highlighted that the previous message implied it also disabled
   XDMCP.

3) Change "Include All Users" checkbox label to "Include All
   Users (Get Include user list from /etc/passwd, not appropriate
   if using NIS)".

4) Change "Face Browser" tab label to "Users", since the information
   on this tab doesn't just affect the face browser, but also controls
   which users can be selected for Automatic/Timed login.  The following
   text is added to the top of this tab to make it more clear what this
   tab does:

   The Users tab specifies which users are visible to GDM.  Users listed
   as Included will appear in the Face Browser if it is enabled in the
   "Security" tab and will also appear in the drop-down list for
   Automatic/Timed login in the "General" tab.  Users listed as Excluded
   will not be displayed regardless of whether "Include All Users" is
   checked.

5) Fixed the sensitivies on the Users tab so that only the Include list
   is made insensitive when "Include All Users" is selected.  Previously
   the Exclude list was also made insensitive, which is a bug since the
   Exclude list is used regardless of whether "Include All Users" is
   checked.

Most of these changes are string changes, and its still before the
String freeze.  The only real UI change is fixing the sensitivity
bug on the Users tab.  Is it okay to put this fix into the 2.12
branch?  The fix is already in GDM2 CVS head, but not in the branch.

There is another issue that Calum highlighted.  According to the
HIG a program shouldn't use a notebook with more than 6 tabs.
gdmsetup uses 8 tabs.  This issue will  wait until a future
release to get fixed, since I'd like Calum to finish the UI review
before fixing this problem.

Brian