[0.80] Delete button is broken in 0.80

[georgthegreat]

In 0.79, when one pressed Delete button on keyboard, a dialog was shown with the confirmation to delete file.
This functionality is broken 0.80 — nothing happens upon button press.

[XnTriq]

See Issue 881 for details.

[Octopuss]

I hope 0.81 will be released ASAP, because this is severely limiting bug