`toggle_sidebar_width` set the new width via core directly, bypassing
the picker-dismiss + hover-expand reset that lives in
`set_active_sidebar_width`. So the user could open the workspace
popover, hit toggle, see the sidebar collapse, and the popover would
reappear on re-expand because the flag never cleared.
Forward toggle through the same entry point. One sidebar-resize code
path for the keyboard, the toggle button, and the drag handle.
ZacharyZhang-NY
cea5f650de