Canceling "Do you want to save..." dialog doesn't work any more (in versions 2.7.0 and later)
(Tested on Arch Linux.)
To reproduce: Create a new patch, add any object to it, then close the patch without saving => the usual "Do you want to save the changes you made in ...?" appears, but it's not possible to cancel the dialog in order to keep the patch. Only the Yes and No options work.
I haven't tested with 2.7.0, but I'm sure that this still worked in 2.6.x, so it must be a recent regression.