When working on desktop screen administration menu has on right site handy ‘arrow’ to flip orientation from horizontal on top to vertical on the left. Reversing this is as easy as to click similar ‘arrow’ on the bottom of menu.

Alas, this is not available on smaller screen, where you are locked in sidebar menu. Luckily there is stupidly simple solution, if you are comfortable to make little tweak in css.

Problem is caused by element with class toolbar-toggle-orientation being asignet style display: none;. Most straightforward solution is overide it with display: block !important;.

Using attribute !important is not ideal but neccessary as we need to override display: none; insertedas inline-style by script.