Feature request: Sticky first column in breakdown views

[joethreepwood]

Is your feature request related to a problem?

So, I was working on the insight I mentioned in this related feature request and I finally got to the part of the breakdown table that I wanted to see -- midnight, 27th April.

So, now I'm thinking: "Yep, we definitely had some big spikes on particular URLs!"

But I looked at the breakdown table to try and see which URLs we had spikes on and, because I've had to scroll horizontally along to the middle of the table, I now can't see the first column of the table (which is where the breakdown values, in this case URLs, are listed.

As a result, after dealing with the fact that the horizontal scroll bar is at the bottom of a table which is larger than the viewport, I now need to remember which rows I want to look at and scroll all the way back to the first column to see what those rows represent.

Again, on a 4K screen that's probably bigger than that used by most users.

Describe the solution you'd like

It would be good if the first column was sticky, so that it stayed in frame as I scrolled horizontally along the table.

Describe alternatives you've considered

Exporting the table. But that's laaaaame.

Additional context

UI issue, tagging @clarkus and @lottiecoxon

Thank you for your feature request – we love each and every one!

[clarkus]

Related solution at #10194

[mariusandra]

This was implemented thanks to a community contributor: #16825

Now we're getting requests to also make the second column sticky.