#33 imglab: warning dialog on exit without save

[Ed Miller]

If I manullay label a bunch of images in imglab, then hit exit without saving, I lose all the edits.

It would be useful to pop up a dialog box to warn you if there are edits which havent been saved.

[Davis]

Yes, that's true. You should submit a pull request with this change on
github :)

[Ed Miller]

If I figure out how to do it, I will...