fix undefined css error when destroying a dialog

Author: mahdiyeh-deriv

src/windows/tracker.es6

@@ -231,6 +231,7 @@ export const track = (options, blankWindow) => {
       save_states();
    });
    blankWindow.on('dialogdestroy',() => {
+      blankWindow.dialogExtend("restore");
       if(state.is_unique){
          delete states[state.module_id];
       }