Drafts indicator

[thirtysixbananas]

This is a tiny UI improvement:

On the Draft button, have an indicator of how many drafts emails you have there.

For example, look at the attached screenshot. On the Inbox button you see a 1 which means not the total number of emails on your Inbox, but the total unread. Everybody understands that. However, the Draft button looks empty. You assume this if you don't think about it much. I actually have 2 drafts in there, but it looks like I have nothing. The number should really mean not "total unread" but something like "total number of items that require action in this button". That's unread for Inbox, and drafts for Drafts.

Thoughts?