Make BrowseHierarchyActionBase responsible for component disposal

platform/lang-impl/src/com/intellij/ide/hierarchy/actions/BrowseHierarchyActionBase.java

@@ -10,6 +10,7 @@ import com.intellij.openapi.Disposable;
 import com.intellij.openapi.actionSystem.*;
 import com.intellij.openapi.diagnostic.Logger;
 import com.intellij.openapi.project.DumbService;
+import com.intellij.openapi.project.DumbUnawareHider;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.util.Disposer;
 import com.intellij.openapi.wm.ToolWindowId;
@@ -74,7 +75,10 @@ public abstract class BrowseHierarchyActionBase extends AnAction {
 
     if (selectedContent != null && !selectedContent.isPinned()) {
       content = selectedContent;
-      final Component component = content.getComponent();
+      Component component = content.getComponent();
+      if (component instanceof DumbUnawareHider) {
+        component = ((DumbUnawareHider)component).getContent();
+      }
       if (component instanceof Disposable) {
         Disposer.dispose((Disposable)component);
       }

platform/platform-api/src/com/intellij/openapi/project/DumbUnawareHider.java

@@ -16,8 +16,6 @@
 
 package com.intellij.openapi.project;
 
-import com.intellij.openapi.Disposable;
-import com.intellij.openapi.util.Disposer;
 import com.intellij.ui.components.JBPanelWithEmptyText;
 import org.jetbrains.annotations.NotNull;
 
@@ -27,7 +25,7 @@ import java.awt.*;
 /**
  * @author peter
  */
-public class DumbUnawareHider extends JBPanelWithEmptyText implements Disposable {
+public class DumbUnawareHider extends JBPanelWithEmptyText {
 
   private final JComponent myDumbUnawareContent;
 
@@ -47,11 +45,4 @@ public class DumbUnawareHider extends JBPanelWithEmptyText implements Disposable
       getComponent(i).setVisible(show);
     }
   }
-
-  @Override
-  public void dispose() {
-    if (myDumbUnawareContent instanceof Disposable) {
-      Disposer.dispose((Disposable) myDumbUnawareContent);
-    }
-  }
 }