Server page redesign

The server page has been redesigned for simplicity. No more tabs — everything is now on the same page.

• Quickly view bandwidth usage and consumption trend from the new Bandwidth usage overview section.
• Collapse items on the sidebar to focus on a specific section. The app remembers items you've collapsed, so the page always looks the way you left it.
• Features like Remote Access, Rescue, Reinstall and Delete are now under the Actions button.
• Copy commonly used values for API requests like *server ID *and *Label *with a single click.
• Fancy new icons throughout.