Ability to start manual builds from menu item

[ZevEisenberg]

Specifying custom git branches would be useful for manual builds. I'm not sure how much of that is in the Jenkins api, but it's how I've seen Jenkins used, and it would be convenient to be able to do it from the menu bar.

[qvacua]

• Doc: https://wiki.jenkins-ci.org/display/JENKINS/Remote+access+API
• I don't know whether it is possible to specify a branch, but triggering a new build would be easy to do