fixed empty space below accordion nav items that dont have a subtitle

lms/static/sass/course/courseware/_sidebar.scss

@@ -125,6 +125,10 @@ section.course-index {
               font-weight: normal;
               display: block;
               margin: 0;
+
+              &:empty {
+                display: none;
+              }
             }
           }
 

lms/templates/courseware/courseware.html

@@ -41,6 +41,7 @@
         $(".ui-accordion-header a, .ui-accordion-content .subtitle").each(function() {
           var wordArray = $(this).text().split(" ");
           var finalTitle = "";
+          if (wordArray.isEmptyObject()) {
             for (i=0;i<=wordArray.length-1;i++) {
               finalTitle += wordArray[i];
               if (i == (wordArray.length-2)) {
@@ -50,6 +51,7 @@
               }
             }
             $(this).html(finalTitle);
+          }
         });
       });
   </script>