Patch Notes: The Mailbox, and Hour's First

The Mailbox

The pause menu now has a mailbox: an envelope beside the hourglass (online).
When the developers send you a message, the envelope shows a count, and a line in the world chat tells you post has arrived.
Open a message to read it. If it holds an item, press Claim and the item goes into the pack of the online character you're playing.
Type /mail in chat to open the mailbox from anywhere: outdoors, indoors or underground, on either menu style.
A message whose item you haven't claimed can't be thrown away by mistake.

The thirteen players of the first Abyss Dungeon clear have been honoured:
- a new title, Hour's First, drawn in rose gold, pearl and the white of dawn;
- a new aura, The First Hour: The Turning Hour's wheel cast in the first dawn's light, with its dial turning forward, the Hour's own mark ablaze, and rays of first light;
- The Hourlock, waiting for each of them in the mailbox.
Wear the title and aura from your profile.

SERVER-POST + HOURS-FIRST: the mailbox beside the hourglass, and the first clear's title, aura and gun by @Lattymoy in #714

Full Changelog: app-v0.1.7143...app-v0.1.7153