- messages are now actually sent (bug in parse player list)
- no more crashes on sending mail (forgot to make variables local)
- actually handle CC and BCC fields instead of leaving them empty, duh
- make new functions be under the mail namespace
- add util functions to ensure the new format, parse and player list as well as checking whether a player is in that list or not
- rearrange some GUI elements (tighter spacing, grouping, increase window height to be consistent)
- convert mails to new format only as needed (old mails stay intact in case someone reverts to old version)
- mails are shaded differently in inbox, depending on whether the player is in the TO field
- FROM, TO and CC fields are all displayed when reading a mail
- add "Reply All" button (TO includes all original recipients plus the sender, but excluding the player himself, while adopting the CC field. To contrast: "Reply" just sets the original sender as TO and leaves the rest empty)
- move reply, replyall and forward to their own functions in GUI (was duplicated for inbox and show mail)
- don't needlessly set messages table when we do nothing but go back
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