CONN-1259: Improve UI Issues on Direct Screens -- NEW PR

This PR includes UI fixes that are related to the AdminGUI Direct pages, and referenced in CONN-1259 (https://connectopensource.atlassian.net/browse/CONN-1259).

CSS:
* pf-override.css -- moodified CSS rules for buttons in Direct pages, as well as Edit Domain modal position.

XHTML:
* directPrime.xhtml -- changed button placements.