Add the ability to tell users which trades are not approved for flair and a brief reason why

[pkmnbumba]

Two parts to this:

Mod side

• When looking through their profile, mods should be able to approve (checkbox) or provide a reason why a trade was not approved (dropdown)
• There will be defaults but also an 'Other' option that should create a textbox for mods to provide a reason

User side

• When reading through their profile, users should be able to see which trades were not approved and the selected reason why

After discussion, we will not show which trades are approved, only the ones that aren't approved.

This will allow us to create an automated message for denying flair apps

[pkmnbumba]

Right now, a reference not being approved means either a mod hasn't looked at it yet or the reference didn't count for flair for some reason https://github.com/pokemontrades/flairhq/blob/d2b5ae4b9f96fa6ea82db3562e4822a9e3b34674/api/models/Reference.js#L41

That said, 'false' for approved isn't exactly clear. There are two main ways that I see that we can deal with this:

1) Use a new boolean just for disapprovals 2) We can use the approved: false and have it default to 'Mod hasn't seen this yet', but we probably don't want people seeing that by default.