Convert the structure of Web IDE left sidebar HTML
Change from a single column of elements, each containing one pair of button+pane, to the new approach of two columns, the first containing the buttons, and the second containing the corresponding panes. This can involve the introduction of a new LeftPane
component. If we run into more unexpected styling issues, stop, and try to address these first as separate prerequisite MRs.
Some of these changes have already been done in !21010 (closed), but are being re-implemented here as part of a more incremental approach.
See the epic &2585 (closed) for more context.
Edited by Chad Woolley