Fixes duplicated contact list when creating a video bridge conference.

src/net/java/sip/communicator/impl/gui/main/call/conference/ConferenceInviteDialog.java

@@ -302,7 +302,7 @@ public void actionPerformed(ActionEvent e)
                             .getSelectedItem());
 
                     if (isVideoBridge)
-                        destContactList.applyDefaultFilter();
+                        destContactList.removeAll();
                 }
             }
         });

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

@@ -782,6 +782,14 @@ public void run()
         }
     }
 
+    /**
+     * Removes all entries in this contact list.
+     */
+    public void removeAll()
+    {
+        treeModel.clear();
+    }
+
     /**
      * Returns a collection of all direct child <tt>UIContact</tt>s of the given
      * <tt>UIGroup</tt>.

src/net/java/sip/communicator/impl/gui/utils/InviteDialog.java

@@ -404,6 +404,7 @@ private Component createDestContactListComponent()
         destContactList
             = GuiActivator.getUIService().createContactListComponent(this);
 
+        destContactList.removeAllContactSources();
         destContactList.setContactButtonsVisible(false);
         destContactList.setRightButtonMenuEnabled(false);
         destContactList.setMultipleSelectionEnabled(true);