Add token name in ListMyOrder command

[greenhat]

Ref #28

1. Show token name in the orders list.
2. Add an optional token name parameter and use it as a filter for the orders list, showing only orders for the given token.

When https://github.com/ergoplatform/eips/blob/master/eip-0001.md is implemented in:
ergoplatform/ergo#897
ergoplatform/ergo#949
We can search for a box that issued the token that holds a token with the given id and R4 holds the name of the token (according to https://github.com/ergoplatform/eips/blob/master/eip-0004.md )

EDIT. Until then we do what coinbarn does - https://github.com/coinbarn/ergo-ts/blob/80551350e882585f7c24ce642e9bc750badc76a3/src/explorer.ts#L64
1. Find the input box with id == token id.
2. Find the tx where this box was spent.
3. In the found tx find output box with our token id.

Should be implemented with new backend API call - ergoplatform/explorer-backend#3

[aslesarenko]

ergoplatform/explorer-back#232

[greenhat]

Should be implemented with new backend API call - ergoplatform/explorer-backend#3