sus LAN v2.0

• Adjust heartbeat (still need more feedback please)
• The whole setting panel has got a whole restyle:
  • Settings now are less crowded, when toggle the option, it will show/hide the options
  • Unified broadcast option to ensure you can use a time also when tunneling
  • If tunnel active then the server is going to be set OFF and vice versa
  • Both server and broadcast options now are "connected" and activate/deactivate at the same time.
  • Errors shown if using more than 15 clients or less than 0 (lol)
  • Errors using wrong port number (still working on this feature anyway)
  • Add version number and GitHub link page.