✨ ETH transaction UI + logic

[istornz]

This PR adds the complete ETH transaction flow and logic implementation.

In this PR

Here are the details of what this PR implements:

Screens

• Choose ETH amount screen with keypad screen.
• Choose recipient address screen.
• Transaction summary screen.

Dialogs

• Transaction loading dialog.
• Transaction status dialog.

NOTE

• It seems transactions were not accepted very often check code here.
• Trigger notifications when a transaction is sent will be implemented next.

Preview

Close #171
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Close #196

[ptisserand]

Ok for me