[Cashtab] Build custom switch to deprecate antd switch

Summary:
Build a custom switch component to replace antd switch in Cashtab

Because implementing this switch on the Airdrop page required restyling the form, restyle it with non-antd form components.

Test Plan:
npm test

npm start and check appearance of airdrop, configure, screens
check appearance of show/hide balance switch
check appearance of new multiple recipients switch on send screen

Reviewers: #bitcoin_abc, emack

Reviewed By: #bitcoin_abc, emack

Subscribers: emack

Differential Revision: https://reviews.bitcoinabc.org/D15783