UPFRONT: Choosing/Creating Sticky menues


I checked out all Upfront Themes and realized that only Panino is actually having a useful navigation which stays on the page while scrolling. All others - especially Issues - are actually loosing the contact to the menu.

I would suggest that all Upfront sites have sticky menus available or if there would be a plugin which would simply create those sticky menus which appear while scrolling down the page on the top of the page to enable customers to navigate through the pages.

Second Question - is there a Plugin which can create those Menus or perhaps even Mega menus which stay sticky while scrolling and how to add a search box. login etc

Thanks a lot