mcs manager multiscreen

[Brian J. Tarricone]

hi all (mainly benny)-

i was tracking an xfdesktop bug that francois found, and i was using 
Xnest in 2-screen mode (:1.0 and :1.1).  i noticed that when i right 
clicked on :1.1 and started the desktop settings panel, 
xfce-setting-show apparently noticed that there was no mcs manager on 
:1.1 and started one.  so now i had two settings managers, and xfdesktop 
was only looking at one of them.  if i tried to change settings on 
screen 0, everything worked fine (i.e., using xfce-setting-show on :1.0 
to change settings for either screen).  but, as expected, using the 
settings manager on :1.1 did nothing.

i really need to know how the mcs manager is going to handle 
multiscreen.  if it's going to stay the way it is now, i'm not sure how 
this is going to work.  i'm going to have to have a settings plugin that 
acts like it does now when we're in xinerama mode (showing multiple 
tabs for each screen), and in non-xinerama mode it will show one tab 
(errr, no tabs) for the current screen, and then to set the other 
screen, you have to move over to that screen, set it there, and so on.  
i really don't like that; i think it's rather icky.

personally, i'd be happy with one mcs manger per display.  i think the 
applications should be responsible for storing settings in such a way 
that makes sense for them, whether they're multiscreen or not.  for me, 
i'm just appending a screen number to the setting names.  that seems to 
work just fine.

thoughts?

	-brian