On the admin overview page

Now lets you know:
- if your branch version is not the latest
- if your branch is a supported branch
- if you are on the development branch (eg master)

behatnotneeded

Change-Id: I42ed605b7a298f7a006ea6f9eba9b3d551dc41ad
Signed-off-by: Robert Lyon <robertl@catalyst.net.nz>