add standard insets to list renderer for dropdown popup

platform/platform-impl/src/com/intellij/openapi/wm/impl/content/TabbedContentTabLabel.java

@@ -21,9 +21,12 @@ import com.intellij.openapi.util.Pair;
 import com.intellij.ui.ClickListener;
 import com.intellij.ui.components.JBList;
 import com.intellij.ui.content.TabbedContent;
+import com.intellij.util.NotNullFunction;
+import com.intellij.util.ui.UIUtil;
 import org.jetbrains.annotations.NotNull;
 
 import javax.swing.*;
+import javax.swing.border.EmptyBorder;
 import java.awt.*;
 import java.awt.event.MouseEvent;
 import java.util.ArrayList;
@@ -64,6 +67,18 @@ public class TabbedContentTabLabel extends ContentTabLabel {
       names.add(tab.first);
     }
     final JBList list = new JBList(names);
+    list.installCellRenderer(new NotNullFunction<Object, JComponent>() {
+      final JLabel label = new JLabel();
+      {
+        label.setBorder(new EmptyBorder(UIUtil.getListCellPadding()));
+      }
+      @NotNull
+      @Override
+      public JComponent fun(Object dom) {
+        label.setText(dom.toString());
+        return label;
+      }
+    });
     JBPopupFactory.getInstance().createListPopupBuilder(list).setItemChoosenCallback(new Runnable() {
       @Override
       public void run() {