[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