The 'hide textbox' option on the 'wait' command doesn't handle pauses shorter than the fadeout period.

[Proggle]

The problem

Describe the bug
If you put a wait command shorter than the fadeout period into timeline, it will continue the fadeout even after text has advanced to the command after the textbox.

To Reproduce
Here's what the timeline looks like (using the off-the-shelf VN style)

Here's the result

NewTileSetDemo.DEBUG.2024-04-04.20-24-48.mp4

Expected behavior
The wait command ending should cancel the fadeout and restore visibility to the text box.

System (please complete the following information):
v4.3.dev5.official [89f70e98d]
Dialogic 2.0 alpha 13