Undo last step doesn't set modified flag

[Eldar Khayrullin]

OS:Ubuntu 16.10.
Version 3.11

[Konstantin Baranovskiy (baranovskiykonstantin)]

Undo last step -- is the initial state of data that equals to content of saved/opened file. That's why flag does not set, no needs to save it.

[Eldar Khayrullin (eldar)]

Steps:
1) modify an arbitrary field
2) Save to file
3) Undo
Result: modification in step 1 canceled but file on disk is saved with modify. Modified flag is non-active. If exit from the program last Undo step isn't saved.

[Eldar Khayrullin (eldar)]

Undo and Redo operation should set modified flag too.

[Eldar Khayrullin (eldar)]

If content on screen and file is different

[Konstantin Baranovskiy (baranovskiykonstantin)]

OK, now I see.

[Konstantin Baranovskiy (baranovskiykonstantin)]

Fixed in rev. 147.