Related-bug: #1331935
Earlier, clicking any main menu on left-hand side like "Configure > Networks"/ "Monitor > Networking", used to just expand that menu and doesn't change the view that's displayed on right-hand side.
Now, it will select the first item under it and loads that page such that the visibile menu is in sync with the view displayed.

Change-Id: I3f9649538908f6869b9c4607e91d87b3834b88de
Merge "Related-bug: #1331935 Earlier, clicking any main menu on left-hand side like "Configure > Networks"/ "Monitor > Networking", used to just expand that menu and doesn't change the view that's displayed on right-hand side. Now, it will select the first item under it and loads that page such that the visibile menu is in sync with the view displayed."