Data views: Table headers are no longer sticky

[jameskoster]

Most likely due to the addition of wrappers like .dataviews-wrapper and .dataviews-view-table-wrapper, table column headers are no longer sticking to the top of the container as you scroll.

Given the additional nesting we may need to use javascript to handle this.

[jameskoster]

Adding Bug label since the current code is effectively broken. If we can't restore this functionality for 6.5 then we should at least remove the broken code.

[annezazu]

@ntsekouras tagging you on this for a 6.5 fix!

[ntsekouras]

The style responsible for this comes from here: #57930

and specifically from:

.dataviews-view-table-wrapper {
	overflow-x: auto;
}

I've tried a few things to make it work, but without success so far. I'll keep looking a bit more, but some folks with more css expertize could be more helpful.

[jameskoster]

I have a potential fix, will open a PR.