If there are two much additional dependencies, the dialog will get two big.
We should also introduce "Don't warn me again" feature on that dialog.
Created attachment 15885 [details]
what's in git
I've added a checkbox so it looks like the attached. I'm yet to work out how to best list the packages properly.
The UI now looks like this in 0.3.x: http://www.packagekit.org/img/gpk-remove-confirm.png