Update Darcula checkbox icons

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

@@ -31,14 +31,19 @@ import java.awt.*;
  * @author Konstantin Bulenkov
  */
 public class DarculaCheckBoxUI extends MetalCheckBoxUI {
-  private static final Icon DEFAULT_ICON = JBUI.scale(EmptyIcon.create(19)).asUIResource();
+  private static final Icon DEFAULT_ICON = JBUI.scale(EmptyIcon.create(18)).asUIResource();
 
   @SuppressWarnings("MethodOverridesStaticMethodOfSuperclass")
   public static ComponentUI createUI(JComponent c) {
+    return new DarculaCheckBoxUI();
+  }
+
+  @Override
+  public void installUI(JComponent c) {
+    super.installUI(c);
     if (UIUtil.getParentOfType(CellRendererPane.class, c) != null) {
       c.setBorder(null);
     }
-    return new DarculaCheckBoxUI();
   }
 
   @Override public void installDefaults(AbstractButton b) {

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

@@ -0,0 +1,23 @@
+// Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
+package com.intellij.ide.ui.laf.intellij;
+
+import com.intellij.ide.ui.laf.darcula.ui.DarculaCheckBoxUI;
+import com.intellij.util.ui.EmptyIcon;
+import com.intellij.util.ui.JBUI;
+
+import javax.swing.*;
+import javax.swing.plaf.ComponentUI;
+
+public class IntelliJCheckBoxUI extends DarculaCheckBoxUI {
+  private static final Icon DEFAULT_ICON = JBUI.scale(EmptyIcon.create(19));
+
+  @SuppressWarnings({"MethodOverridesStaticMethodOfSuperclass", "UnusedDeclaration"})
+  public static ComponentUI createUI(JComponent c) {
+    return new IntelliJCheckBoxUI();
+  }
+
+  @Override
+  public Icon getDefaultIcon() {
+    return DEFAULT_ICON;
+  }
+}

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

@@ -86,7 +86,7 @@ FormattedTextField.background=ffffff
 FormattedTextFieldUI=com.intellij.ide.ui.laf.darcula.ui.DarculaTextFieldUI
 FormattedTextField.border=com.intellij.ide.ui.laf.darcula.ui.DarculaTextBorder
 
-CheckBoxUI=com.intellij.ide.ui.laf.darcula.ui.DarculaCheckBoxUI
+CheckBoxUI=com.intellij.ide.ui.laf.intellij.IntelliJCheckBoxUI
 CheckBox.border=com.intellij.ide.ui.laf.darcula.ui.DarculaCheckBoxBorder
 
 ComboBoxUI=com.intellij.ide.ui.laf.darcula.ui.DarculaComboBoxUI