Add 'switch user' and/or 'log out' options to the CMS UI

[willthomson]

I'm finding that my edit privileges are applied to different accounts (blinkk/google) for different projects, so I often have to switch accounts when moving between projects. I don't use separate Chrome profiles for these two accounts, so currently this requires me to remember and then manually type the login URL (/cms/login). It would be great if the avatar icon in the bottom left of the CMS UI had a context menu with a 'switch user' link to this path, and possibly a log out option too.

[stevenle]

this is good feedback, i'm starting to cut a release for root v2 soon and can include this in that release.

(for the access issue, feel free to add both your google and blinkk accounts to the acl so you don't have to switch repeatedly)