Limit list constraints to a max of 13

Author: JM-Mendez

src/js/common.js

@@ -215,10 +215,14 @@ function initializeSavedLists(){
                     ].filter(title => title !== el.textContent);
                 }
                 else {
-                    el.dataset.listConstraintActive = "true";
-                    el.classList.add('active');
-                    var listName = el.textContent;
-                    window.imTableConstraint['savedList'].push(listName)
+                   if(window.imTableConstraint['savedList'].length === 13){
+                      window.alert('You can only select a max of 13 List Contraints')
+                   } else{
+                      el.dataset.listConstraintActive = "true";
+                      el.classList.add('active');
+                      var listName = el.textContent;
+                      window.imTableConstraint['savedList'].push(listName)
+                   }
                 }
             });
         });