Fileroller is prevented from opening a window in gnome shell if a window is already open

[i30817]

It simply shows the 'wait cursor' but does nothing.

I know that this is default behaviour for apps in gnome 3, but there should really really be a exception for file roller, because it doesn't have support for a tab view, and because this can be used to merge zip file trees and a tab view is not really appropriate for _that_ even if it worked.
(a remarkably similar situation to copy pasting files with nautilus - another usability disaster for that usecase imo - but this one is worse since there is no common tree to navigate).

As such, i propose that file roller be blacklisted from the 'don't open in a new window' functionality. In whatever way your project supports.