SPARK-891: Typing notifications would be easier to see if also displayed near typing area

-Implement XEP-0085
1)Provide event handling for following chat states according with document:
-paused (user stopped typing message)
-composing (user started typing message)
-active(chat window gained focus)
-inactive (after 2 minutes of inactivity or chat focus lost)
-gone (after 10 minutes of inactivity)
2)Added text on chat window to display current chat state
3)Accomodate XEP-0022 (obsolete) impplementation into XEP-0085

-fixed chatTextInput focus event handling

git-svn-id: http://svn.igniterealtime.org/svn/repos/spark/trunk@12897 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/LoginDialog.java

@@ -92,6 +92,7 @@ import org.jivesoftware.smack.XMPPConnection;
 import org.jivesoftware.smack.XMPPException;
 import org.jivesoftware.smack.packet.XMPPError;
 import org.jivesoftware.smack.util.StringUtils;
+import org.jivesoftware.smackx.ChatStateManager;
 import org.jivesoftware.spark.SessionManager;
 import org.jivesoftware.spark.SparkManager;
 import org.jivesoftware.spark.Workspace;
@@ -1103,6 +1104,8 @@ public class LoginDialog {
 
             // Since the connection and workgroup are valid. Add a ConnectionListener
             connection.addConnectionListener(SparkManager.getSessionManager());
+            //Initialize chat state notification mechanism in smack
+            ChatStateManager.getInstance(SparkManager.getConnection());
 
             // Persist information
             localPref.setLastUsername(getLoginUsername());