Feedback when no editions are found

www.agileplannerapp.com/boards/173808/cards/8827

editors are getting confused and think that editions filter is not working. also, updated the search results title to include the classification scope that would be applied.

![screen shot 2014-12-08 at 17 12 18](https://cloud.githubusercontent.com/assets/230074/5338969/49810c64-7f00-11e4-926c-f3bcb26513bd.png)

We don't need the top margin here, as unlike the other feature tables there's no subheading. Perhaps it should also have that subheading which resembles the filter state (separate story?). eg

![screen shot 2014-12-10 at 10 56 43](https://cloud.githubusercontent.com/assets/319055/5374795/43fd0228-805b-11e4-9842-4be68ab3e07f.png)