Implements #433 Profile Fields Enhancements
Working on #454 Hide stuff users don't have permission to use
Hide "Empty Folders" and "Download Messages" in private.php if user has no PMs
Working on #454 Hide stuff users don't have permission to use
Select the "Custom Reason" radio automatically if there are no default types of warnings
Implements #433 Profile Fields Enhancements
Fix SQL error on install
Merge pull request #822 from Sama34/wip-433

Implements #433 Profile Fields Enhancements #810
Fixing ordering of parameters for array_merge.
Merge branch 'feature' of https://github.com/mybb/mybb into featurefix-754
Merge pull request #823 from euantorano/featurefix-754

Fixing #754 by re-ordering parameters to array_merge based on @Sama34's suggestions.