Add video player and deployment status

Add deployment step video player
Add deployment status
Change background color
Change notification text
Fix info notification popping up multiple times at once

Added twitter link and fixed step text not updating

Fix step not updating when opening app in resumed state
Add @Nasawebb Twitter button link
Add 'Loading..' placeholder
Add Font Awesome Icons
Change info snackbar text and icon

Where is Webb?

• Send a push notification to all users as soon as the JWST has reached a new deployment step.
• Show snackbar at start to inform about future notifications.
• Show snackbar when new deployment step happens while the app is open.