Protect-time changes

Protect-time has gained some positive changes.

The invulnerability time is still 5 seconds. Invulnerability is canceled earlier than this time if:

• run away from the spawn point by one meter.

This is more true in relation to other players, and allowed to add dynamics to the gameplay.

We added a visual protection indicator in the form of a shield in the lower left corner of the screen. Also, the indicator is displayed above other players on the map.