disconnect functionality

core/src/main/groovy/com/muwire/core/chat/ChatClient.groovy

@@ -110,6 +110,7 @@ class ChatClient implements Closeable {
     public void close() {
         connectThread?.interrupt()
         connection?.close()
+        eventBus.publish(new ChatConnectionEvent(status : ChatConnectionAttemptStatus.DISCONNECTED, persona : host))
     }
     
     void ping() {

core/src/main/groovy/com/muwire/core/chat/ChatConnectionAttemptStatus.java

@@ -1,5 +1,5 @@
 package com.muwire.core.chat;
 
 public enum ChatConnectionAttemptStatus {
-    CONNECTING, SUCCESSFUL, REJECTED, FAILED
+    CONNECTING, SUCCESSFUL, REJECTED, FAILED, DISCONNECTED
 }

gui/griffon-app/controllers/com/muwire/gui/ChatServerController.groovy

@@ -6,6 +6,8 @@ import griffon.inject.MVCMember
 import griffon.metadata.ArtifactProviderFor
 import javax.annotation.Nonnull
 
+import com.muwire.core.chat.UIDisconnectChatEvent
+
 @ArtifactProviderFor(GriffonController)
 class ChatServerController {
     @MVCMember @Nonnull
@@ -13,5 +15,6 @@ class ChatServerController {
 
     @ControllerAction
     void disconnect() {
+        model.core.eventBus.publish(new UIDisconnectChatEvent(host : model.host))
     }
 }