Co-authored-by: MD <1917406+mdcfe@users.noreply.github.com>
This feature adds a new configuration option, `change-tab-complete-name`
When `change-tab-complete-name` is turned on, `getPlayers()` in `EssentialsCommand` will use `getDisplayName()` instead of `getName()`; populating the list with display names instead of player names.
Closes#4431.
* New `/mail sendtemp <time diff> <message>` command to send mail that will self-destruct after time diff.
* New `/mail clear <number>` command to clear a specific mail item.
* `/mail read` now tracks which mails you read and won't nag you about them.
* A bunch of other flexibility since we store actual data instead of strings