make the dialogs borders the same for composite and non composite mode
more consistent behavior -and- fixes a test on openbox
Change-Id: Idd687a1f3b44f89d35886e1f9a86c2543741cbdb
Breeze theme usually has borders and center that can be tiled, which
ends up in more performant rendering, as we don't need to re-render
anything from the svg every time we resize an element.
Basically what we did was "s/hint-stretch-borders/hint-tile-center/g".
The only exceptions we found for this were: picker, dragger and monitor.
Reviewed by David Edmundson
CCMAIL: plasma-devel@kde.org
