webadmin: fixed context-sensitive help icon

commit 42e9396 broke the context-sensitive help icon. Fixed.
Also moved the header text up one pixel to align with the
fixed icon.

Bug-Url: https://bugzilla.redhat.com/1119027
Change-Id: Iff8f6605a89dad1f57b15a63de2ffa8e67825418
Signed-off-by: Greg Sheremeta <gshereme@redhat.com>