Issue assets frontend

This branch has been rebased from https://github.com/Nevtep/omniwallet/commits/smart-property-issuance for easier review.

This is the frontend for issuing assets.
  - Depends on https://github.com/mastercoin-MSC/omniwallet/pull/568 for Service calls.
  - Depends on https://github.com/mastercoin-MSC/omniwallet/pull/569 fir routing and navigation.