[REQUEST] Triggering a popup window (save before closing) when interacting with timeline

[Kaikogf]

--Issue Summary--

when adding a new sound layer, and importing a sound file and playing back with it and then decide to close Pencil2D, it will not ask for saving the actual changes and will close immediately.

--Actual Results

Pencil2D will close immediately regards changes on the sound file layers

--Expected Results--

A pop-up window warning of changes on the timeline.

[chchwy]

This is a part of undo/redo improvements, will put this into the 0.7 plan.

[Jose-Moreno]

[2019] This happens when using File > Import > Sound and then letting Pencil2D create the sound layer for you. If you create the sound layer manually and add the file using the "add keyframe" button this does not happen. It seems a specific problem related to the import action.

[scribblemaniac]

As @chchwy said, it is undo/redo related, and should be fixed in @CandyFace's undo/redo rewrite. I am assigning this to him just to make that clearer.