Ethereum Studio v0.4.1

Updates

• Support mnemonic generated keypairs
• Support struct type parameters in the contract tab
• Validators for hex and (u)int type inputs, and limit the max length for bytes{n} type inputs
• Select ABIs from the opened project in the "Enter New ABI" modal
• Detect and handle ctrl+c in node & docker download terminals
• Detect and require PowerShell on Windows
• Detect node start failure and update the UI
• Fix bug: fatal error in entering byte[] type items