Hide right sidebar

Is it possible to hide the right sidebar? The most annoying thing is that right sidebar prevents using the slider correctly, because the slider shold always be stuck to the far right side of the screen (this way you don't need to "aim", just flick the cursor of the mouse to the right of the screen).

Hiding everything worked for a while with CTRL+H, but there was an update of some sort that hid the slider as well 😞