Added a "Go Fullscreen" button at the top right of the page when viewing a tab.

I was trying to look at a tab on my phone in landscape and my url bar was taking up a huge percent of the available real estate. Even "view desktop mode" didn't help that much.

I don't have an iPhone or an iPad, but I hear there's a built-in way of hiding the url bar in Safari, and Safari blocks an element going fullscreen except video, so you won't see the button.

Hopefully it helps to show more tab on screen so we don't have to scroll so much.