(Izabel theme Free) I used catch sticky menu but it doesn't work on mobile

1. I used catch sticky menu but it doesn't work on mobile. I just want to stick menu only, not #masthead. So I entered #site-header-menu to the mobile menu selector of Catch sticky menu. It works on a desktop but not on mobile. What should I do? This is my website: www.ivisitkorea.com 2. I'd like to remove the search magnifier of the desktop browser. So I entered below to additional CSS. #site-header-right-menu .search-form { display:none; } Ane the search box disappeared on mobile, but the magnifier on the desktop browser is still there. How can I remove the search magnifier? I used below CSS but didn't work. #search-toggle { display: none; } Thank you for your help in advance. Best regards, Jay Han