Added tile addition function to tile addition button

target/classes/static/html/mock.html

@@ -146,7 +146,7 @@
                     </div> -->
                 </div>
                 <div class="max-width centered-content small-vertical-margin">
-                    <button class="modification-button btn-addtile"><i class="icon-plus"></i></button>
+                    <button id="btn-newtile" class="modification-button btn-addtile"><i class="icon-plus"></i></button>
                 </div>
             </div>
         </div>

target/classes/static/js/datatransfer.js

@@ -32,7 +32,7 @@ const getUpdate = function(){
 const dataRefresh = function(){
     getData();
 }
-$('#iconPlus').click(function(){callAddMessage()});
+$('#btn-newtile').click(function(){callAddMessage()});
 $('#btn-addRow').click(function(){addRow()});
 //TODO remove later save onclick init
 $('#btn-save').click(getUpdate);