“Hiding” settings now causes the settings to be drawn outside the main canvas area - tested in Chrome (PL supported) and Opera (PL unsupported) - results the same. It happens that the main canvas area is not exactly window width so the moved settings panel is visible… but even if it were, the movement effectively increases the viewport size and a horizontal scroll bar appears. (wrong HTML visibility applied?)
Note also that this morning (after waking from sleep - the PC, not me) there was nothing in the Settings section except “Open code” for any model… until I accessed PL from Opera and then, when I went back to Chrome the settings reappeared (I had already tried F5 refresh in Chrome). Alas since I wasn’t “investigating” that at the time I don’t have more details.