Fix stuck tooltips

Fix stuck tooltips by implementing custom data  request function, and destroying existing tooltips on new data load.

Fixes #81

backend/templates/main.html

@@ -4,7 +4,7 @@
 <a id="bfb" role="button" class="btn btn-primary btn-lg btn-block mb-2" href="/list">Eintragen</a>
 <table class="table entries"
         data-toggle="table"
-        data-url="/api/queue"
+        data-ajax="dataRequestQueueAndDestroyTooltips"
         data-pagination="true"
         data-classes="table"
     data-show-refresh="false"