Option to hide sideboard

Pls have an option for users to have the sideboard hidden by default. Currently it pops out at every click and occupies quite a fair bit of the screen. We have to select the retract button, only for it to pop out again at next click. This is getting irritating. If the purpose of the new layout is to have a clean look and feel, we should be given an option to have that sideboard hidden by default.