SSR: prevent leaking of dialog with project

GitOrigin-RevId: b413591661d7aef4f15cc2fd9524bd77a3ec53ad

platform/structuralsearch/source/com/intellij/structuralsearch/plugin/ui/StructuralSearchDialog.java

@@ -185,6 +185,7 @@ public class StructuralSearchDialog extends DialogWrapper {
       @Override
       public void projectClosing(@NotNull Project project) {
         close(CANCEL_EXIT_CODE);
+        ProjectManager.getInstance().removeProjectManagerListener(searchContext.getProject(), this);
       }
     });
   }