Editor can be closed without saving document

[AStepaniuk]

Newly typed document is lost if user closes application (e.g. by mistake), then cancels file save operation in "File save" dialog.

Steps to reproduce:

1. Create new blank document
2. Start typing document
3. Close application
   Here dialog appears with suggestion if document needs to be saved
4. Click "yes"
   Here "File save" dialog appears
5. Click "Cancel"

Expected result
"File save dialog" is closed, but application is working. User is able to modify or save the document
This is typical behavior for editors. Cancellation file save operation causes cancellation application exiting too.

Actual result
Application is closed. Document is not saved.

[parthagar]

+1. Would love to see this, this is the only thing stopping me from migrating from Sublime.