QoL update

-The first time you sign up with a new class you will now automatically get assigned that class role.
This change allows users to sign up with the green check mark without having to manually assign themselves the roles by clicking the class emoji on the role post. Removal of class roles is still exclusively done via the role post.
-The displayed time zones in raid posts are now configurable.
You will need to update your config file, version 3.4.0 will not work with old config files. The examples have been updated accordingly.