Use sendNow in menus when sending data for first time

src/main/kotlin/ru/dbotthepony/mc/otm/menu/MatteryMenu.kt

@@ -402,45 +402,45 @@ abstract class MatteryMenu @JvmOverloads protected constructor(
 		}
 	}
 
-	override fun broadcastChanges() {
+	private var broadcastOnce = false
+
+	protected fun matteryBroadcast() {
 		val payload = mSynchronizer.collectNetworkPayload()
 
 		if (payload != null) {
-			MenuNetworkChannel.send(ply, MenuFieldPacket(containerId, payload))
+			if (broadcastOnce) {
+				MenuNetworkChannel.send(ply, MenuFieldPacket(containerId, payload))
+			} else {
+				MenuNetworkChannel.sendNow(ply, MenuFieldPacket(containerId, payload))
+			}
 		}
 
-		super.broadcastChanges()
-
 		val consumer = PacketDistributor.PLAYER.with { ply as ServerPlayer }
 
 		for (slot in _filterSlots) {
 			val packet = slot.sendChanges()
 
 			if (packet != null) {
-				MenuNetworkChannel.send(consumer, packet)
+				if (broadcastOnce) {
+					MenuNetworkChannel.send(consumer, packet)
+				} else {
+					MenuNetworkChannel.sendNow(consumer, packet)
+				}
 			}
 		}
+
+		broadcastOnce = true
+	}
+
+	override fun broadcastChanges() {
+		super.broadcastChanges()
+		matteryBroadcast()
 	}
 
 	override fun broadcastFullState() {
 		mSynchronizer.invalidate()
-		val payload = mSynchronizer.collectNetworkPayload()
-
-		if (payload != null) {
-			MenuNetworkChannel.send(ply, MenuFieldPacket(containerId, payload))
-		}
-
 		super.broadcastFullState()
-
-		val consumer = PacketDistributor.PLAYER.with { ply as ServerPlayer }
-
-		for (slot in _filterSlots) {
-			val packet = slot.sendChanges(true)
-
-			if (packet != null) {
-				MenuNetworkChannel.send(consumer, packet)
-			}
-		}
+		matteryBroadcast()
 	}
 
 	override fun stillValid(player: Player): Boolean {