Fix db inconsistancies with region mailbox
Summary
fs_bezirk
and fs_fodsaver
both have the column mailbox_id
, linking to fs_mailbox
.
fs_bezirk
has some more columns that get used in some places and cause bugs, confusion and inconsistencies:
email
email_pass
email_name
All three are legacy code and should be removed from the code and database entirely.
This causes multiple known (and maybe more unknown) bugs. In many places, the wrong mail address is displayed. Also changing the mail address of exisiting regions doesn't seem to work currently.