Rewrite display widget

[danirabbit]

Fixes #200

To Test:

• [ ] Someone with a cellular modem

Todo:

• [ ] Make sure one connection is always shown
• [ ] Update wireless strength
• [ ] Figure out a better way to preserve the right amount of space for widgets
• [ ] Wireless doesn't show immediately when enabled
• [ ] Show VPN
• [ ] DRY
• [ ] Handle airplane mode