Improve Accessability: e.g. Search result with tab and key

[duichwer]

There should be a easy way to navigate to the search results with the keyboard. E.g. by pressing key down or up?
The only way I can navigate with the keyboard, is by pressing Shift+Tab if there are any search results, but its impossible for me to switch between the search categories.

I don't know if its a common behaviour, but maybe you could close the search result by clicking the escape key.