[1014669] RFE: Link to particular metric from Resource Metric graph portlet
Added the resource name as a link in the Portlet window title, so it's now
possible to link back.
- also made analogous fix for group metric graph portlet
- also fixed additional issue with graph disappearing on maximize/minimize

(cherry picked from commit 5b02f0120503ee91a4579337fa324d9ab9486c48)
Signed-off-by: Jay Shaughnessy <jshaughn@redhat.com>