Year Menu elements being hidden

[demetrios-koziris]

All mcen-yearMenuItemLI elements are having the following style attribute applied to them:
display: none;

This seems to be due to Drupal behavior for hiding overflowing items from a menu:

  /**
   * If menu is too wide for one line, hide overflowing items.
   */
  Drupal.behaviors.longMainMenu = {

    attach: function( context ) {

      var longMenuEl = $( ".sf-main-menu > li.first" );

      /*
       * Page loads completely before measuring which menu items are on the line.
       * If other menu items are displayed below (i.e. in second line) hide
       * them.
       */
      setTimeout(function(){

        // Execute only if menu has more than one item.
        if ( longMenuEl.length > 0 ) {

          // Get top position of regular menu items
          var topLocation = longMenuEl.position().top;

          // Make sure loop has only run once.
          var hasLooped = false;

          if(!hasLooped) {

            $( ".sf-main-menu > li" ).each( function() {

                if ( $( this ).position().top != topLocation ) {
                  $( this ).hide();
                }
            });

            // Prevents multiple loops.
            hasLooped = true;
          }
        }
      }, 800);
    }
  };

source: https://www.mcgill.ca/study/2014-2015/files/study.2014-2015/js/js_1ElH_15kX_bq7jptFK0fLDW6Ljruj1633N7OWPR3e_4.js

The hide function is defined as follows:

hide: function(a, b, c) {
            if (a || a === 0) return this.animate(cc("hide", 3), a, b, c);
            for (var e = 0, f = this.length; e < f; e++) {
                var g = d.css(this[e], "display");
                g !== "none" && !d._data(this[e], "olddisplay") && d._data(this[e], "olddisplay", g)
            }
            for (e = 0; e < f; e++) this[e].style.display = "none";
            return this
        },

source: https://www.mcgill.ca/study/2014-2015/sites/all/libraries/modernizr/modernizr.js?opa6td

[demetrios-koziris]

Can resolve by not using the sf-main-menu class for the year menu.