[1135018] Login page scaling down issue
pf: improving scrollbars, calendar popup widget now uses same colors as the rest of the ui, adding shadows to popup dialogs, removing unused css link reference from login page, listgrid on users view now has 1 column that takes the rest of the screen's width, etc.

(cherry picked from commit 120bf6e25b85678ea544524ce9fec82dfd37bd56)
Conflicts:
	modules/enterprise/gui/coregui/src/main/webapp/login
	modules/enterprise/gui/coregui/src/main/webapp/org.rhq.coregui.CoreGUI/sc/skins/CoreGUI/skin_styles.css
Signed-off-by: Jay Shaughnessy <jshaughn@redhat.com>