Issue-disable add button if pending method, hide existing methods from select

Automated Review Comments Issues in components/PublicPiggybankPage/EditPiggybankModal/EditPiggybankModal.jsx:

(8, 'Hardcoded string found')
(11, 'TODO found')
(11, 'Line exceeds 80 characters')
(13, 'Line exceeds 80 characters')
(13, 'Hardcoded string found')
(14, 'Hardcoded string found')
(15, 'Hardcoded string found')
(16, 'Hardcoded string found') Issues in components/PublicPiggybankPage/EditPiggybankModal/PaymentMethodsInput.jsx:
(6, 'Line exceeds 80 characters')
(10, 'Hardcoded string found')
(12, 'Hardcoded string found')
(13, 'Hardcoded string found')
(20, 'Line exceeds 80 characters')
(25, 'Line exceeds 80 characters')
(26, 'Hardcoded string found')
(27, 'Line exceeds 80 characters')
(31, 'Line exceeds 80 characters')
(32, 'Line exceeds 80 characters')
(34, 'Line exceeds 80 characters')
(35, 'Line exceeds 80 characters')
(36, 'Line exceeds 80 characters')
(40, 'Line exceeds 80 characters')
(40, 'Hardcoded string found')
(50, 'Line exceeds 80 characters')
(50, 'Hardcoded string found')
(52, 'Line exceeds 80 characters')
(53, 'Line exceeds 80 characters')
(55, 'Line exceeds 80 characters')
(65, 'Hardcoded string found')
(68, 'Hardcoded string found')
(69, 'Hardcoded string found')
(70, 'Hardcoded string found')
(82, 'Hardcoded string found')
(85, 'Hardcoded string found')
(86, 'Hardcoded string found')
(87, 'Hardcoded string found')
(98, 'Hardcoded string found')
(102, 'Line exceeds 80 characters')
(103, 'Hardcoded string found')
(104, 'Hardcoded string found')
(105, 'Hardcoded string found')
(106, 'Line exceeds 80 characters')

lind0118 / coindrop