When you drag a file to the Unity launcher, only the applications that are supposed to open that file will remain active, while all others become deactivated.
Is it possible to configure Unity to ignore that setting and open the file, no matter what extension the file has, with any of the applications on the launcher?
I'd be glad to get an unsupported file type from the application when I make a mistake instead of losing a bunch of time configuring what application can open what file (that's because it is no longer possible to add a custom application/path in the Open with... menu)
It should still work. Unity only highlights the application that it knows can open that file but it should still open if dragged on a non-highlighted app. I have just tested this with the latest version of Ubuntu.