Fix lag display plugin using deprecated methods

Change-Id: I5f8a128dd57f79aee696d21ee55da796824470f0
Reviewed-on: http://gerrit.dmdirc.com/1153
Automatic-Compile: Gregory Holmes <greg@dmdirc.com>
Reviewed-by: Gregory Holmes <greg@dmdirc.com>

src/com/dmdirc/addons/lagdisplay/LagDisplayPlugin.java

 import com.dmdirc.interfaces.ConfigChangeListener;
 import com.dmdirc.plugins.Plugin;
 import com.dmdirc.ui.WindowManager;
-import com.dmdirc.ui.interfaces.Window;
 import com.dmdirc.util.RollingList;
 
 import java.util.Date;
         }
 
         if (!useAlternate && type.equals(CoreActionType.SERVER_GOTPING)) {
-            final Window active = WindowManager.getActiveWindow().getFrame();
+            final FrameContainer<?> active = WindowManager.getActiveWindow();
             final String value = formatTime(arguments[1]);
 
             getHistory(((Server) arguments[0])).add((Long) arguments[1]);
             pings.put(((Server) arguments[0]), value);
 
-            if (((Server) arguments[0]).ownsFrame(active)) {
+            if (((Server) arguments[0]).isChild(active) || arguments[0] == active) {
                 panel.setText(value);
             }
 
             panel.refreshDialog();
         } else if (!useAlternate && type.equals(CoreActionType.SERVER_NOPING)) {
-            final Window active = WindowManager.getActiveWindow().getFrame();
+            final FrameContainer<?> active = WindowManager.getActiveWindow();
             final String value = formatTime(arguments[1]) + "+";
 
             pings.put(((Server) arguments[0]), value);
 
-            if (((Server) arguments[0]).ownsFrame(active)) {
+            if (((Server) arguments[0]).isChild(active) || arguments[0] == active) {
                 panel.setText(value);
             }
 
             panel.refreshDialog();
         } else if (type.equals(CoreActionType.SERVER_DISCONNECTED)) {
-            final Window active = WindowManager.getActiveWindow().getFrame();
+            final FrameContainer<?> active = WindowManager.getActiveWindow();
 
-            if (((Server) arguments[0]).ownsFrame(active)) {
+            if (((Server) arguments[0]).isChild(active) || arguments[0] == active) {
                 panel.setText("Not connected");
                 pings.remove((Server) arguments[0]);
             }
                 final long sent = Long.parseLong(((String[]) arguments[2])[3].substring(9));
                 final Long duration = Long.valueOf(new Date().getTime() - sent);
                 final String value = formatTime(duration);
-                final Window active = WindowManager.getActiveWindow().getFrame();
+                final FrameContainer<?> active = WindowManager.getActiveWindow();
 
                 pings.put((Server) arguments[0], value);
                 getHistory(((Server) arguments[0])).add(duration);
 
-                if (((Server) arguments[0]).ownsFrame(active)) {
+                if (((Server) arguments[0]).isChild(active) || arguments[0] == active) {
                     panel.setText(value);
                 }
             } catch (NumberFormatException ex) {