[Bounty] Implement sending to Silent Payment addresses - 0.01 BTC

[sethforprivacy]

A bounty has been opened on silentpayments.xyz from a trusted, anonymous source to implement sending support in Electrum to Silent Payment addresses.

I wanted to open an issue here to raise awareness and ensure that prospective contributors are aware of open bounties for Electrum from outside sources.

You can learn more about the bounty at https://silentpayments.xyz/docs/bounties/ and find more development resources focused on Silent Payments at https://silentpayments.xyz/docs/developers/.