Implement editor for Command permission overrides

[RheaAyase]

This will be implemented bot-side: https://github.com/RheaAyase/Botwinder.core/issues/50

• This should be a separate config page: Button to go there would be on the server-select page.
• It would work very similar to the way the config page works, where it would simply iterate through all the commands specified in the json config (storage/app/configFile.json iirc) and always display just a name of a command, and a drop-down menu containing standard permissions, and a list of blocked channels...
  • Default = -1,
  • Everyone = 0,
  • Nobody,
  • ServerOwner,
  • Admins,
  • Moderators,
  • SubModerators,
  • Members
• Default values are obvious.
• This configuration would be stored similar to the standard config, in the ServerID folder as commands.json