Invalid addresses in send funds

[sentry-io]

To replicate:
In send funds, enter a single character like a in the recipient address field, then press enter.
To fix, please add validation on the input field to prevent submission of invalid addresses.

Sentry Issue: TALISMAN-EXTENSION-X93

React ErrorBoundary Error: Decoding a: Invalid decoded address length
  at new ErrorBoundaryDatabaseMigration (/./src/@talisman/components/ErrorBoundaryDatabaseMigration.tsx:32:8)
  at ErrorBoundary (/./src/@talisman/components/ErrorBoundary.tsx:47:33)

Error: Decoding a: Invalid decoded address length
  at encodeAnyAddress (/../../packages/util/dist/talismn-util.esm.js:51:12)
  at convertAddress (/./src/@talisman/util/convertAddress.ts:10:10)
  at a (/./src/ui/hooks/useContact.ts:11:23)
  at useContact (/./src/ui/hooks/useContact.ts:9:10)
  at ox (/./src/ui/domains/SendFunds/SendFundsAmountForm/AddressPillButton.tsx:28:19)
...
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