Fix href attribute in Add Section link

Author: thiagogq

sections.html

@@ -57,7 +57,7 @@
     <div id="content">
       <div class="title-div">
         <span>Sections</span> 
-        <a class="button" href="/section-edit.html">Add Section</a>
+        <a class="button" href="section-edit.html">Add Section</a>
       </div>
       <div class="details-header">
         <details class="extrainfo">