Fixed
- With Hide the space's name on and a space with no icon, the buttons at the top of
the sidebar sit where Zen and Customize Toolbar put them (the ⋯ menu and sidebar button
on the left). The empty space-name area still stretched across the row and pushed them
all to the end. On macOS they follow the window buttons as before. - In Customize Toolbar, the sidebar's top row is yours to arrange from end to end: the
space's name made way only for a narrow box at the end, with nowhere to drop buttons
(thanks PowerFactory).