Arrowing through quicklists should probably not include separators.

[Luke Yelavich]

When moving through quicklists using arrow keys, separators should not be included as an item you can arrow to. Its not possible to arrow to a separator in a GTK menu, so the quicklist UI should behave the same.

1. Navigate to the launcher with Alt + F1.
2. Navigate to applications or files and folders.
3. Open the quicklist with right arrow.
4. Arrow down to the separator. You will notice the separator gets treated as a menu item, even though pressing enter does nothing, i.e the quicklist closes, but nothing happens.

 affects ubuntu/unity
 status triaged

 affects unity