Fix jshint error introduced in commit d4c1677

ui/static/js/link_state_handler.js

@@ -1,6 +1,6 @@
 class LinkStateHandler {
     static flip(element) {
-        let labelElement = document.createElement("span")
+        let labelElement = document.createElement("span");
         labelElement.className = "link-flipped-state";
         labelElement.appendChild(document.createTextNode(element.dataset.labelNewState));
 

ui/static/js/mouse_handler.js

@@ -3,7 +3,10 @@ class MouseHandler {
         let elements = document.querySelectorAll(selector);
         elements.forEach((element) => {
             element.onclick = (event) => {
-                noPreventDefault || event.preventDefault();
+                if (! noPreventDefault) {
+                    event.preventDefault();
+                }
+
                 callback(event);
             };
         });