add cryptopower to /wallets

[dreacot]

closes #1143 https://github.com/crypto-power/cryptopower/issues/127

[xaur]

Missing . at the end of the text label.

Similar to #1141 I suggest to change the first link like: Download and release notes to better communicate what is behind the link. "GitHub" is alien and confusing for end users looking to download the app.

Some ideas for the second link:

• "Source code" -> https://github.com/crypto-power/cryptopower
• App's website
• Twitter account where to follow for updates

[dajohi]

needs rebase

[dreacot]

@dajohi rebased✅

@xaur changes effected

[dreacot]

@jholdstock rebased