[Cashtab] Support slpv1 mint txs

Summary:
T1711

Support slpv1 mint txs

If user does not have mint baton for given token, disable the switch

Always mint with a created mint baton.

Test Plan: npm test

Reviewers: #bitcoin_abc, emack

Reviewed By: #bitcoin_abc, emack

Subscribers: emack

Differential Revision: https://reviews.bitcoinabc.org/D15829