fixed the header declaration for OBS::EnsureCropValid; the main window n...

The main window now shows the current profile as requested per #223 

![title](https://f.cloud.github.com/assets/2565912/831508/dfcef9a8-f1ec-11e2-8d71-40e62c7396dd.png)

Same goes for the notification area icon tooltip

![narea](https://f.cloud.github.com/assets/2565912/831509/eb3652dc-f1ec-11e2-9090-c695ed02c977.png)