Improve the "Debug Console" to add functionality and fix bugs (#944)

* Update the home.html file that powers the "Debug Console":
- Improved the CSS code and JS code
- Added the support for the "show 'list'" options as a select
- Add an additional section to show only the "list" commands, when the user selects such option
- Fixed the code detecting "list" messages, as it was missing cases where the JSON content had a "Ports" property but its value was null instead of an empty array.

* The Debug Console is now jQuery-free.
- The code has been restructured to be simpler and avoid global variable as much as possible.

Author: Xayton