Mail system improvements

The mail ui could be greatly improved like so:

1. Add an option to forward mails

2. Add an option to reply to the mail sent (useful when sending important stuff so you don't miss type the player's name)

3. Add a spell check after 2 seconds of typing the characters name: when finished, you'll be shown character faction, level and rebirth, and active status. This is useful for people trying to scam mails after a person changes names, or hoping for typos

4. Allow seeing the mails outside of ch (of course retrieving objects won't work). Maybe with an option on f12.

5. Show attached item stats when hovering.