fix missing arrow icons in menus

src/com/bulenkov/darcula/DarculaLaf.java

@@ -96,6 +96,8 @@ public final class DarculaLaf extends BasicLookAndFeel {
       defaults.put("Spinner.arrowButtonSize", new Dimension(16, 5));
       defaults.put("Tree.collapsedIcon", new IconUIResource(IconLoader.getIcon("/com/bulenkov/darcula/icons/treeNodeCollapsed.png")));
       defaults.put("Tree.expandedIcon", new IconUIResource(IconLoader.getIcon("/com/bulenkov/darcula/icons/treeNodeExpanded.png")));
+      defaults.put("MenuItem.arrowIcon", new IconUIResource(IconLoader.getIcon("/com/bulenkov/darcula/icons/menuItemArrowIcon.png")));
+      defaults.put("Menu.arrowIcon", new IconUIResource(IconLoader.getIcon("/com/bulenkov/darcula/icons/menuItemArrowIcon.png")));
       defaults.put("CheckBoxMenuItem.checkIcon", EmptyIcon.create(16));
       defaults.put("RadioButtonMenuItem.checkIcon", EmptyIcon.create(16));
       defaults.put("InternalFrame.icon", new IconUIResource(IconLoader.getIcon("/com/bulenkov/darcula/icons/internalFrame.png")));