Simplify and improve submenu

[mariobehling]

Please improve the submenu below the search box as follows:

• Delete "Engine", "Type", "Max"
• Keep the search engine dropdown menu and to the left of it implement a submenu more similar to Google
• If submenu items are not available, e.g. "News" show them on dark gray color
  

[areebbeigh]

I'd like for this issue to be assigned to me. I already have an initial version ready to merge. Waiting for confirmation.