View NFTs and Home page redesign

• NFTs views including audio and video playback
• Reimagined home screen UI
• Redesigned header. Now you can change your account and network from the header
• Bug fixes and small improvements

Fix issue with updated casper-js-sdk

As CLPublicKey.toHex() now by default returns checksummed value was used legacy mode - CLPublicKey.toHex(false)

CSPR, ERC-20 transfers, Topper integration

Here are the key features that we've included in this release:

• Send/Receive $CSPR
• Send/Receive ERC-20 Tokens on Casper Network
• Review account deploy history
• Topper Integration for Quick Fiat-to-$CSPR Conversion
• Bug fixes and improvements