Fixes issue 3416: Escape doesn't close search panel

Change-Id: I65c80232990b7775314c2da8dc37c6f2a429e3f4
Reviewed-on: http://gerrit.dmdirc.com/282
Reviewed-by: Chris Smith <chris@dmdirc.com>
Tested-by: Chris Smith <chris@dmdirc.com>

src/com/dmdirc/addons/ui_swing/components/SwingSearchBar.java

      */
     @Override
     public void keyPressed(final KeyEvent event) {
-        if (event.getSource() == searchBox) {
+        if (event.getSource() == searchBox.getTextField()) {
             if (event.getKeyCode() == KeyEvent.VK_ESCAPE) {
                 close();
             } else if (event.getKeyCode() == KeyEvent.VK_ENTER) {