feat/1055 - Faucet settings

[jurevans]

Resolves #1055

• Added settings modal to configure Faucet API url with basic persistence (localStorage)
• Restructured a bit
• Faucet Limit is now determined by settings (from API)
• Updated components so that forms submit on Enter key

Testing

• Build and load the faucet app as per usual, in the top right, click the gear icon
• Enter a new valid URL, then submit
• If this new URL cannot load settings, you will see an error. Setting this to a valid API url will reload the settings and clear the error
• Reload page to ensure this was persisted, or check the local storage key for baseUrl

[mateuszjasiuk]

Cool! Tested and it works for me :)