feat: OMG Network deposits from the admin panel

[kalouo]

Issue/Task Number:

Closes #1194 Closes #1221

Overview

This PR wires up the deposit flow for the admin panel – along with a few miscellaneous enhancements.

Changes

Enables deposits from the admin panel

Miscellaneous:

• Removes Metamask logic from the blockchain wallets page.
• Adds OMG network configurations to blockchain settings page and orders all settings according to backend position.
• Fixes "connected to Ethereum" message bug.

Implementation Details

Deposits:

• Deletes HotWalletTransferChoser.js
• Replaces it with a BlockchainActionSelector.tsx component refactored for extendability and reusability.
• Refactors the blockchain wallet detail page (where BlockchainActionSelector is used) into TypeScript.
• Refactors deposit action to send deposit amount as string type.
• Corrects root chain/child chain identifier sent from client in root chain/child chain balance requests
• Enable string amount parameter on /blockchain_wallet.deposit_to_childchain (with added test)