Fix help and documentation for record variables

[tfmorris]

The current help for the record variable in the web client points to https://github.com/OpenRefine/OpenRefine/wiki/Variables#record, but that's just a stub that includes a generic link to the top level of the user manual.

It could be updated to point to https://docs.openrefine.org/manual/expressions#record, but it would be better to just include the documentation in the help, like everything else except the record variable.

Also, the manual's documentation could use improvement. For row.record.cells it says "The cells of the row" when it's a slice of cells from the record for the given column.

[allanaaa]

I'm working on the in-tool help text right now, so that part is assigned to me.

I will take a look at the manual text after that, unless someone else gets to it first.

[tfmorris]

OK, thanks, but in the meantime, I don't think it's very friendly to just be pointing folks at what is effectively a dead end. Any fix to the help is only going to affect future versions, not all the versions that are out in the field.

[allanaaa]

That part is up to @ostephens. Owen is taking care of manually redirecting the newly-blanked wiki pages to specific parts of the manual, so I will leave it to him whether he wants to do so for the URLs included in the Help text.

(In our spreadsheet I did mark a handful of wiki pages that are still in the codebase, but I didn't include the URLs that appear in the Help text.)

[tfmorris]

@ostephens Please do not replace specific content with generic links. I've fixed this page, but if there are any others, please fix them.

[ostephens]

@tfmorris sorry I was in the process of putting in the specific links last night but didn't get them all done before I had to stop. Those are all done.