Make performance tab warning text red (#7581)

Follow up to #7577

<img width="581" alt="Screenshot 2024-07-29 at 10 45 47 AM"
src="https://github.com/user-attachments/assets/c3316e53-c41a-4866-9592-56731d6bc1f8">

Author: helin24

flutter-idea/src/io/flutter/performance/FlutterPerformanceView.java

@@ -45,6 +45,9 @@
 
 import javax.swing.*;
 import javax.swing.border.CompoundBorder;
+import javax.swing.text.SimpleAttributeSet;
+import javax.swing.text.StyleConstants;
+import javax.swing.text.StyleContext;
 import java.awt.*;
 import java.util.ArrayList;
 import java.util.HashMap;
@@ -189,17 +192,12 @@ private void addPerformanceViewContent(FlutterApp app, ToolWindow toolWindow) {
     FlutterSdkVersion sdkVersion = sdk == null ? null : sdk.getVersion();
     if (sdkVersion != null && sdkVersion.canUseDevToolsMultiEmbed()) {
       final JPanel warning = new JPanel(new BorderLayout(50, 50));
-      JTextArea area = new JTextArea(
-        "The performance panel is being removed soon. Use the Flutter DevTools panel instead: View -> Tool windows -> Flutter DevTools");
-      area.setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
-      area.setLineWrap(true);
-      area.setWrapStyleWord(true);
-      area.setOpaque(false);
-      area.setEditable(false);
-      area.setFocusable(false);
-      area.setFont(UIManager.getFont("Label.font").deriveFont(Font.BOLD));
-      area.setBackground(UIManager.getColor("Label.background"));
-      warning.add(area);
+      JTextPane text = new JTextPane();
+      text.setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
+      text.setCharacterAttributes(StyleContext.getDefaultStyleContext().addAttribute(SimpleAttributeSet.EMPTY, StyleConstants.Foreground, new Color(234, 57, 35)), false);
+      text.setText("The performance panel is being removed soon. Use the Flutter DevTools panel instead: View -> Tool windows -> Flutter DevTools");
+      text.setFont(UIManager.getFont("Label.font").deriveFont(Font.BOLD));
+      warning.add(text);
       perfViewsPanel.add(warning);
     }