v2.7.6

• Add testnet4 chain for BTC
• Raise BTC minimum fee
• GUI improvement for high DPI screen
• Update ZIL API for domain resolution
• Update SOL getLastBlock method
• Update Fantom RPC
• Update BSC explorer
• Update PyNaCl library
• Support Cryptnox BG2
• Some code cleanups

No MacOS binary for now.