It's possible to lose changes in Brackets

[JeffryBooher]

The double close mechanism in Brackets could cause you to lose unsaved changes.

1. Start Brackets
2. Open the starter project
3. Make a change
4. Click the close button to quit Brackets
5. Prompt to save (click yes),
   ==> changes are saved but brackets doesn't quit
6. Make some more changes
7. Click the close button to quit brackets
   ==> Not prompted to save unsaved changed and brackets shutsdown

This was filed as #5714 but the unsaved changes problem wasn't fully recognized at the time.

[pthiess]

Reviewed - high priority / data loss.

[peterflynn]

@JeffryBooher Rather than having two bugs tracking the same fix, can you move these notes over to #5714 and bump up its priority to match? (and then close this duplicate)

[JeffryBooher]

Closing as dup of #5714