Improved server shutdown order

Improved GE threading, introduced locks fixing server lags and GE offers not executing
Moved player login hooks to the major update worker (from management server thread)
Fixed random events in rare circumstances causing noted item loss

Server/src/main/kotlin/rs09/worker/MajorUpdateWorker.kt

@@ -32,6 +32,7 @@ import kotlin.system.exitProcess
  * @author Ceikry
  */
 class MajorUpdateWorker {
+    var running: Boolean = false
     var started = false
     val sequence = UpdateSequence()
     val sdf = SimpleDateFormat("HHmmss")
@@ -39,7 +40,7 @@ class MajorUpdateWorker {
         Thread.currentThread().name = "Major Update Worker"
         started = true
         Thread.sleep(600L)
-        while(true){
+        while(running){
             val start = System.currentTimeMillis()
             Server.heartbeat()
 
@@ -75,6 +76,8 @@ class MajorUpdateWorker {
             ServerMonitor.eventQueue.add(GuiEvent.UpdatePulseCount(GameWorld.Pulser.TASKS.size))*/
             Thread.sleep(max(600 - (end - start), 0))
         }
+
+        SystemLogger.logInfo("Update worker stopped.")
     }
 
     fun handleTickActions() {
@@ -127,10 +130,13 @@ class MajorUpdateWorker {
 
     fun start() {
         if(!started){
+            running = true
             worker.start()
         }
+    }
 
-        //if (ServerConstants.ALLOW_GUI)
-        //    ServerMonitor.open()
+    fun stop() {
+        running = false
+        worker.interrupt()
     }
 }