Add height to the auction records in the walletdb.

[nodech]

Auctions per name can occur many times if it ever expires or the auction fails and reopens. This can lead to bad UX when viewing auction, bid, reveal information from the wallet.
Modification should be applied to:

• txdb.A[name-hash] -> txdb.A[name-hash][height]
• txdb.i[name-hash][tx-hash][index] -> txdb.i[name-hash][height][tx-hash][index]
• txdb.B[name-hash][tx-hash][index] -> txdb.B[name-hash][height][tx-hash][index]

It may also be necessary to leave existing indexes for certain actions. Needs review.

This is also related to #877
And #867

[nodech]

More involved solution to solving multiple problems related to this: #892