Auto reconnect

 * Second DDNet settings page with some settings
 * Auto reconnect feature
 * In-game commands:
  - reconnect_ban
  - reconnect_ban_timeout
  - reconnect_full
  - reconnect_full_timeout
Changed:
 * Disconnected popup
 * Name for first DDNet settings page

Signed-off-by: CookieMichal <MrCookieMichal@gmail.com>