[Design] Remove behavior

[Davor Cubranic]

Jeffrey Harris wrote:
> There's some question about what should happen if the dashboard is
> selected but the current item is only in the dashboard because it's in a
> mine collection (bug 6960).  Currently we only allow delete from the
> dashboard in this circumstance, not remove.  Excluding the item from the
> dashboard but leaving it in it's source collection is one possibility,
> but I think breaking the mine-implies-in-dashboard rule is liable to
> confuse people.
>   
Maybe I don't use collections as effectively as I could, but I sometimes 
find myself having items in a collection that I don't want to show up in 
the Dashboard even though I'm happy to have there most other items from 
the same collection.

Davor