Feature request: hot keys for backward/forward buttons

As a hot key user for application navigation it comes kind of natural to use the Alt-cursor-left/right keys to navigate forth and back on the navigation history just like page wise stepping in the browsers.

So, it would be great to have the backwards and forward buttons on the top left put on the hot keys in analogy to browser standards. I know the space key is already there for play/stop.

Many thanks!