* Renaming some component classes in DataTable
* Some more renaming of DataTable component classes
* Separate styling for fixed rows/columns from labels
* Highlight fixed rows/cols affected by colour differently
* Tweaking styles for fixed data in DataTable
* Update DataTable snapshots
* Add row label to Row metadata
* Wiring up some labelled row logic behind flags
* Renaming variable in DataTable
* Variable renaming in DataTable
* [no ci] Labelling rows progress
* Add RenderedRow abstraction to DataTable
* Computing label widths
* Use the Column object to represent row label column
* Ability to toggle row labels reactively
* Adjust width calculation for label widths
* Add DataTable.RowLabelSelected
* Posting the RowLabelClick message
* Hovering of row labels applies new style
* Remove a print
* Ensure horizontal scrolling with column cursor accounts for row label column
* Account for possible row labels in cell cursor horizontal scrolling
* Ensure cursor highlighting is correct on row label cells
* Document component class for DataTable label hover
* Test to ensure clicking row label emits correct event
* Add snapshot test for DataTable with fixed rows/cols and row labels
* Using pilot pause instead of wait_for_idle directly
* Update CHANGELOG
* Add a docstring
* Add a note to CHANGELOG.md about RowLabelSelected
