Personally I think calling it anything is just unnecessary and if anything would cause confusion. Because we need to mention that you press Alt+F2 to get there - no need to add a name for it.

[In this answer][1] I think the added 'Dash Run' text is confusing (it is to me at least).

Seeing as we don't have an official name for this, I think it would be better not to call it anything.


  [1]: https://askubuntu.com/questions/39843/application-indicator-for-shutter/39854#39854