fix(header-flyout): remove animation on < medium screen size (#4163)

fix(header-flyout): remove animation @ mobile screen size

Author: jmcbgaston

src/features/header-flyout/styles/HeaderFlyout.scss

@@ -121,6 +121,8 @@
         }
 
         .header-flyout-overlay {
+            animation: none;
+
             .header-flyout-title {
                 padding-bottom: 0;
             }