search the menu using input box (#1317)

* working version

* change onchange to oninput with minimum of three chars

* working version with delay and fix for category click

src/main/resources/webgoat/templates/main_new.html

@@ -151,6 +151,8 @@
                 </button>
             </a>
 
+            <input class="form-control" type="text" id="search" name="search" th:placeholder="#{searchmenu}"  style="width:60%" />
+            <script src="js/search.js" ></script>
 
         </div>
     </header>