Refactor how resizeable panel is handled for CollapsibleSidebar
So it will not need to be the responsibility of CollapsibleSidebar
anymore (the version of CollapsibleSidebar
on master currently has this, and it should be removed).
See the MR (!26043 (closed)) for more details.
NOTE: !26043 (closed) was been replaced with the following MRs:
See the epic &2585 (closed) for more context.
Edited by Chad Woolley