Move toggle menu into its own macro.

Use ToggleMenu macro in application team table.

styles/atat.scss

@@ -39,6 +39,7 @@
 @import "components/sticky_cta.scss";
 @import "components/error_page.scss";
 @import "components/member_form.scss";
+@import "components/toggle_menu.scss";
 
 @import "sections/login";
 @import "sections/home";