UX: Warn when closing multiple notes at once

[TriVoxel]

If I am in the main window with countless notes open, and I press Ctrl+Q, all my notes are immediately closed. This is normally fine, however it may annoy or confuse some users.

I think it would be better if there were a popup asking "Are you sure you want to close X notes?" with a toggle switch to never ask again when more than the number of application windows exceeds 1.