Header view with label of unknown height

[jkwiecien]

Part of my header view is TextView with unlimited lines number. At the moment of creating actionbar helper I don't know the text that will be displayed, it comes from the web service later. The problem is, that is the text takes more than one line, not whole header is shown initialy. I think there should be a way to invalidate view later on.

[jkwiecien]

I see sombody already addressed this: #80