Fixes "Remove contact" message when the account is not logged in.

resources/languages/resources.properties

@@ -374,6 +374,7 @@ service.gui.REMOVE_ACCOUNT=&Remove account
 service.gui.REMOVE_ACCOUNT_MESSAGE=Are you sure you want to remove this account?
 service.gui.REMOVE_CONTACT=&Remove contact
 service.gui.REMOVE_CONTACT_TEXT=<DIV>Are you sure you want to remove <B> {0} </B><BR>from your contact list?</DIV>
+service.gui.REMOVE_CONTACT_NOT_CONNECTED=You need to be connected in order to remove this contact. Please sign in and try again.
 service.gui.REMOVE_GROUP=&Remove group
 service.gui.REMOTELY_ON_HOLD_STATUS=Remotely on hold
 service.gui.RENAME=&Rename

src/net/java/sip/communicator/impl/gui/main/contactlist/AddContactDialog.java

@@ -385,8 +385,7 @@ public void actionPerformed(ActionEvent e)
                     GuiActivator.getResources().getI18NString(
                     "service.gui.ADD_CONTACT_ERROR_TITLE"),
                     GuiActivator.getResources().getI18NString(
-                            "service.gui.ADD_CONTACT_NOT_CONNECTED",
-                            new String[]{contactAddress}),
+                            "service.gui.ADD_CONTACT_NOT_CONNECTED"),
                     ErrorDialog.WARNING)
                 .showDialog();
 

src/net/java/sip/communicator/impl/gui/main/contactlist/MetaContactListManager.java

@@ -380,6 +380,20 @@ public RemoveContactThread(Contact contact)
 
         public void run()
         {
+            if (!contact.getProtocolProvider().isRegistered())
+            {
+                new ErrorDialog(
+                    GuiActivator.getUIService().getMainFrame(),
+                    GuiActivator.getResources().getI18NString(
+                    "service.gui.ADD_CONTACT_ERROR_TITLE"),
+                    GuiActivator.getResources().getI18NString(
+                            "service.gui.REMOVE_CONTACT_NOT_CONNECTED"),
+                    ErrorDialog.WARNING)
+                .showDialog();
+
+                return;
+            }
+
             try
             {
                 if(Constants.REMOVE_CONTACT_ASK)