If create-and-link-portals is true, then teleporting to the nether will
not go to a central portal point and instead create a portal in the
nether at the same coordinates as the portal in the overworld.
Teleporting back will not be affected.
https://github.com/BentoBoxWorld/BSkyBlock/issues/464
* WIP - adds admin commands to handle damaged island db
Trash, purge, etc.
DO NOT MERGE YET
https://github.com/BentoBoxWorld/BentoBox/issues/505
* Prefixes the island uniqueId with the game mode name.
This enables manual removal of old game mode island files from the
database by admins if required.
* Adds Admin trash and empty trash commands
* Adds various commands for trash management
* Remove unused imports
* Forgot the javadoc in IslandsManager