v4.1 RCON fixes, server_command() update, and other QoS update

Fixing RCON bugs and functionality and other QoS updates.

• Now shows newly updated interval when changing autosave interval.
• Autosave loop now pauses if detects server is unreachable and resumes when back online, by utilizing new server_active boolean.
• New server_active variable, this is mostly for when using RCON. If you try sending multiple commands to an unreachable RCON server, the bot will be held up for a while trying to constantly connect. So this variable will let the bot know if it's active or not.
  • Only ?check and ?stats will actually check server status, and if found active will update server_active boolean so the other commands will work.
• mc_command is now server_command, will also check if server status and update server_active accordingly.
  • Also, removed bot_ctx parameter.
• New ?check command can check if server is active and reachable.
• New ?setchannel and ?resetchannel functions to set channel_id variable so bot can message without a ctx.
• Did some code cleanup, docstring updates, refactoring, and renaming functions to make it less confusing, and moved some functions to new extra_functions.py file.