update Icons and Backgrounds (#2338)

* Delete minecraft_servers/icegaming/icon.png

* Delete minecraft_servers/icegaming/icon@2x.png

* Add files via upload

* Delete minecraft_servers/icegaming/icon@2x.png

* Add files via upload

* Delete minecraft_servers/icegaming/background.png

* Delete minecraft_servers/icegaming/background@2x.png

* Add files via upload

Author: Khionor