Fixes File Owner for BrowserViewController.xib

Was `WebViewController`. Now `BrowserViewController`
Updates the browser's URL when a link is tapped.

This causes the reload button to reload the current page, rather than the first loaded page.

Doesn't yet work when back/forwards buttons are pressed (as this is causing loading of individual page elements to update the URL)
Fixes URL not updating when back is pressed.

Doesn't yet work when forward is pressed (as that doesn't cause a URL request)
Browser's URL is updated when forward button is pressed.
Improves reliability of forward button.