fix darcula trees based on JTree

platform/platform-impl/src/com/intellij/ide/ui/laf/darcula/darcula.properties

@@ -102,6 +102,8 @@ Spinner.editorBorderPainted=false
 
 SplitPane.highlight=3c3f41
 
+TreeUI=com.intellij.ide.ui.laf.darcula.ui.DarculaTreeUI
+
 Hyperlink.linkColor=589df6
 
 #List.background=45494A

platform/platform-impl/src/com/intellij/ide/ui/laf/darcula/ui/DarculaTreeUI.java

@@ -0,0 +1,31 @@
+/*
+ * Copyright 2000-2013 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.intellij.ide.ui.laf.darcula.ui;
+
+import com.intellij.util.ui.tree.WideSelectionTreeUI;
+
+import javax.swing.*;
+import javax.swing.plaf.ComponentUI;
+
+/**
+ * @author Konstantin Bulenkov
+ */
+public class DarculaTreeUI extends WideSelectionTreeUI {
+  @SuppressWarnings({"MethodOverridesStaticMethodOfSuperclass", "UnusedDeclaration"})
+  public static ComponentUI createUI(JComponent c) {
+    return new DarculaTreeUI();
+  }
+}