Unselect the tube after it has been poured

js/game.js

 		
 		if (this.selectedTube == newSelectedTube)
 			this.selectedTube = null;
-		else if (this.canPourInto(this.selectedTube, newSelectedTube))
+		else if (this.canPourInto(this.selectedTube, newSelectedTube)){
 			this.pourColorInto(this.selectedTube, newSelectedTube);
+			this.selectedTube = null;
+		}
 		else if (!newSelectedTube.isEmpty())
 			this.selectedTube = newSelectedTube;
 	}