correctly sort End empty time

debomatic-webui/public/javascripts/utils.js

@@ -118,6 +118,8 @@ var Utils = {
 
     // format time from a timestamp
     format_time: function (timestamp, time_in_bold, short) {
+        if (!timestamp)
+            return '';
         var date = new Date(timestamp * 1000);
         var locale = navigator.language || 'en-US';
         var options = null;

debomatic-webui/views/history.ejs

@@ -15,8 +15,8 @@
             <tr>
                 <th class="filter-select filter-exact" data-placeholder="All">Distribution</th>
                 <th>Package</th>
-                <th data-placeholder=">= 01/01/1990">Start</th>
-                <th data-placeholder=">= 01/01/1990">End</th>
+                <th data-empty="top" data-placeholder=">= 01/01/1990">Start</th>
+                <th data-empty="top" data-placeholder=">= 01/01/1990">End</th>
                 <th>Uploader</th>
                 <th class="filter-select filter-exact" data-placeholder="All">Status</th>
             </tr>