Discard additional redo on committing actions

[KoBeWi]

Fixes #97376
When doing scene operation, global redo is discarded.
When doing global operation, all scenes' redo is discarded.

[RobProductions]

Thanks, this is great! I tested it by recreating @MajorMcDoom 's reproduction steps and it seems to work as expected :D

Capture2024-09-24.11-58-33.mov

[MajorMcDoom]

Thanks, this is great! I tested it by recreating @MajorMcDoom 's reproduction steps and it seems to work as expected :D
Capture2024-09-24.11-58-33.mov

Likewise, can confirm, this is great!

[Mickeon]

We can all agree this makes sense.

[Jordyfel]

Should discard_redo() be exposed? Seems reasonable that a user might want to do a similar thing in their undo/redo system

[Mickeon]

I'd say one thing at the time, worth discussing separately.

[akien-mga]

Thanks!