Icon for menu item (max size for icons:<br> — for the first level items 32x32px / for HiDPI 64x64px). If you don't use <b>Short description</b> for the first level menu items, then max size will be 24x24px / for HiDPI 48x48px<br> — for the second level items max icons width 100px / for HiDPI 200px)