Release v0.5.1

What's Changed

• show zero when there's no balance by @bordalix in #464
• nit: message when activating wallet by @bordalix in #469
• missingtransaction error handling by @louisinger in #466
• Do not initialize send amount to 0 in address-amount-form by @louisinger in #468
• Unblind utxo if needed on NEW_UTXO events by @louisinger in #472
• Fix manifest v2 extension & release v2 artifact by @louisinger in #467
• Quick fix fee estimation by @bordalix in #474
• Show data about pset to sign inside marina.signTransaction popup by @louisinger in #470

Full Changelog: v0.5.0...v0.5.1