Feature request: Add a new media control: play next command

[BartolomeSintes]

I would suggest to add a third icon in the media control panel, one that allowed a step-by-step playback of the test.

I am not sure if there is a standard icon for this operation. I have drawn this one as an example

Motivation

Sometimes, in order to understand the failure of a command, you need to see what has happened in the previous steps but Selenium 4 is too fast ;-) Replay the test, pause some commands before the failure and then advance command by command would help.

[toddtarsi]

@BartolomeSintes - Just wanted to let you know, the latest version is really quite stable. Please test if you get a chance, and this will be the one I add a new 'stable' or 'beta' tag to or whatever. Sorry for the delay in stabilizing this stuff!

[toddtarsi]

Oh, I tried to add play next step here, but it gave me a little grief (side-runtime handles single command play commands in a special way that I have to wrangle with), so it will be in the next version.

[toddtarsi]

@BartolomeSintes - Oh oops, this might be in 98 but it really doesn't work good yet. I might just fix it and dash out 99