Implement the classic stage info auto-generator. #1764
Description
Separate part of #1755.
Should think about is it possible to auto-generate the time just by layout index?
Or:
- Should record more info or relation in the layout class
- Should record the start time and end time by user(Use this way only if there's no better choice.)
https://youtu.be/vYqWRiAA4_Y
Here's the video that better for thinking.
And it's the effect that classic layout mode wants to do.