Disabled few tests that require to take the window border thickness in account  (for GNUstep).
Disabled few tests that require to take the window border thickness in account 
(for GNUstep).

Note: All test pass on GNUstep (not yet on Mac OS X).


git-svn-id: 0833b781a6984bca00fd44c5b8a33a6c879c84c9@8000 7b3f36aa-e6db-49c1-8b4c-66eac1997e64

etoile/EtoileUI,etoile/EtoileUI