Tweaks to explorer asset view

[JonRay15]

The Chore

The asset view is a bit screwed up currently ... it is showing account balances for things ike this:

When those things only ever have a balance for a split second at the end of ann epoch when the transfer comes in before it is distributed as rewards.

We think we should change this ...

Option 1

• [ ] Only display the following accounts for each asset
  • [x] ACCOUNT_TYPE_NETWORK_TREASURY
  • [ ] ACCOUNT_TYPE_INSURANCE (this is per market so you'll have to pull in the market name too from the markets API)
  • [x] ACCOUNT_TYPE_GLOBAL_INSURANCE

Option 2

• [ ] Just display any account that has a "non-crumb" balance
• [ ] Assess the crumbiness of a balance by showing any account with more than 10 quantum of that asset in it

Additional details / background info

• [x] Obviously we'll always need to adjust all balances for asset decimals
• [x] Do this in the component as it applies everywhere

[edd]