Navbar updates - Foundation Icons

Still in the process of doing the navbar/topbar right, especially when we run out of window/screen size. Doesn't collapse well in such cases.

This is a step forward - the right-side button group is not as tall anymore as we start to us icons here instead of plain text.

Foundation icons are used for this, they all have titles to reveal their intent a little better.

Many icons to use here, I am sure we'll find other spots where they come in handy. the `dependencyTree` directive already uses it to provide access to its settings panel.