Make sure the mb_* functions default to UTF-8.
Fix bug where the default locale would not set after enabling/disabling any locale pack.
Merge pull request #2172 from vanilla/hotfix/set-default-locale-fix

Fixes bug where the default locale would not set after enabling/disabling any locale pack.
Merge pull request #2171 from vanilla/hotfix/mb-encoding

Ensures that mb_* functions default to UTF-8.
Merge pull request #2160 from vanilla/hotfix/authentication-save

Fixes incorrect column name when saving UserAuthenticationProvider.
Merge pull request #2164 from vanilla/hotfix/array-role-sync

Allows an array of roles to be passed in to UserModel->SynchUser().
Update utility sorting functionality.
Merge branch 'hotfix/utility-sort' of github.com:vanilla/vanilla into stage