[MC-55775] Statistics screen sometimes doesn't show up to date information

Steps to reproduce

Load a world in survival mode
Look at the statistic "Distance Fallen"
Fall down some blocks
Look at the statistic "Distance Fallen" again (Statistics will not update)
Again fall down some blocks
Look at the statistic "Distance Fallen" again (Statistics will update)

Exceptions

You have fallen down 4 times after last reset (This means after last correct and loaded value or reopening the world)
Your statistics are resetted

The reason

In 1.8 there is a cooldown for statistic requests in the statistics sending method of the server:

StatisticsFile.java (1.8)

public void func_150876_a(EntityPlayerMP p_150876_1_) {
	int var2 = this.field_150890_c.getTickCounter();
	HashMap var3 = Maps.newHashMap();

	/*
	 * If not at least 300 ticks have passed from when the last time
	 * statistics were requested, it just sends an empty map, so no statistics get
	 * updated
	 */
	if (this.field_150886_g || var2 - this.field_150885_f > 300) {
		this.field_150885_f = var2;
		Iterator var4 = this.func_150878_c().iterator();

		while (var4.hasNext()) {
			StatBase var5 = (StatBase)var4.next();
			var3.put(var5, Integer.valueOf(this.writeStat(var5)));
		}
	}

	p_150876_1_.playerNetServerHandler.sendPacket(new S37PacketStatistics(var3));
}