Responsive sidebar menu

Dear Kriesi team,

I’ve got the following problem: I created a website using the Enfold Theme and a sidebar menu. There, I set some menu items as mega menu.

Now my problem is that on low resolution dispays I won’t see the whole menu as some menu items are shown below the screen’s edge. I want the menu to be sticky, but the menu items to be shown facing upwards from the menu button and not downwards. Is there a possibility to do so?

Thanks in advance!