status box: turn pulsing animation into 1-second blinking, to reduce CPU load

With the pulsing animation (which appears when the websocket connection is
down) the CPU load and GPU load goes up, which probably also uses up lots
of battery time.

webroot/css/_status.less

@@ -8,12 +8,12 @@ nav .status {
 	&.connecting,
 	&.running {
 		background-color: #ffb400;
-		animation: blinkDot 2s infinite;
+		animation: blinkDot 1s infinite steps(1);
 	}
 	&.offline,
 	&.failed {
 		background-color: #dc0067;
-		animation: blinkDot 1s infinite;
+		animation: blinkDot 2s infinite steps(1);
 	}