Bug 1069662 - (JON3-16) Adapt JON UI title bar to common Red Hat L&F

keep navbar & main login page styles in separated file - it was not a good
idea to include those into skin_styles.css

(cherry picked from commit 84005ee7085bd6e66d479704b29035ffbc440ee0)
Signed-off-by: Libor Zoubek <lzoubek@redhat.com>

Conflicts:
	modules/enterprise/gui/coregui/src/main/webapp/org.rhq.coregui.CoreGUI/sc/skins/CoreGUI/skin_styles.css