Fixes a bug in search filter reported by Matthieu Casanova on dev. (subject: "Re: [sip-comm-dev] Del key printed in search field")

src/net/java/sip/communicator/impl/gui/main/MainFrame.java

@@ -18,7 +18,6 @@
 import net.java.sip.communicator.impl.gui.*;
 import net.java.sip.communicator.impl.gui.customcontrols.*;
 import net.java.sip.communicator.impl.gui.event.*;
-import net.java.sip.communicator.impl.gui.lookandfeel.*;
 import net.java.sip.communicator.impl.gui.main.call.*;
 import net.java.sip.communicator.impl.gui.main.chat.conference.*;
 import net.java.sip.communicator.impl.gui.main.contactlist.*;
@@ -118,6 +117,16 @@ public void windowClosed(WindowEvent event)
             {
                 MainFrame.this.windowClosed(event);
             }
+
+            public void windowActivated(WindowEvent event)
+            {
+                ConfigurationManager.setApplicationVisible(true);
+            }
+
+            public void windowOpened(WindowEvent event)
+            {
+                ConfigurationManager.setApplicationVisible(true);
+            }
         });
 
         this.initTitleFont();
@@ -1452,6 +1461,7 @@ public boolean dispatchKeyEvent(KeyEvent e)
             if (
                 e.getKeyChar() == KeyEvent.CHAR_UNDEFINED
                 || e.getKeyCode() == KeyEvent.VK_ENTER
+                || e.getKeyCode() == KeyEvent.VK_DELETE
                 || e.getKeyCode() == KeyEvent.VK_BACK_SPACE
                 || e.getKeyCode() == KeyEvent.VK_TAB
                 || e.getKeyCode() == KeyEvent.VK_SPACE