MainNet Countdown

[TruszczynskiA]

The first App version that will connect with the MainNet will need to have a visible small countdown timer on the home screen. The timer should be hidden when the DNS Lookup call returns a non-empty list.

Definition of done:

• The App should show the timer on the home screen when there is now MainNet's base nodes available
• The feature should be easy to remove from the project/codebase