More than a year ago might as well be never (fixes #690)

gui/app.js

@@ -371,6 +371,10 @@ syncthing.controller('SyncthingCtrl', function ($scope, $http, $translate, $loca
     var refreshNodeStats = debounce(function () {
         $http.get(urlbase+"/stats/node").success(function (data) {
             $scope.stats = data;
+            for (var node in $scope.stats) {
+                $scope.stats[node].LastSeen = new Date($scope.stats[node].LastSeen);
+                $scope.stats[node].LastSeenDays = (new Date() - $scope.stats[node].LastSeen) / 1000 / 86400;
+            }
             console.log("refreshNodeStats", data);
         });
     }, 500);

gui/index.html

@@ -266,8 +266,8 @@
                     </tr>
                     <tr ng-if="!connections[nodeCfg.NodeID]">
                       <th><span class="glyphicon glyphicon-eye-open"></span>&emsp;<span translate>Last seen</span></th>
-                      <td translate ng-if="stats[nodeCfg.NodeID].LastSeen.indexOf('1970') > -1" class="text-right">Never</td>
-                      <td ng-if="stats[nodeCfg.NodeID].LastSeen.indexOf('1970') < 0" class="text-right">{{stats[nodeCfg.NodeID].LastSeen | date:"yyyy-MM-dd HH:mm"}}</td>
+                      <td translate ng-if="!stats[nodeCfg.NodeID].LastSeenDays || stats[nodeCfg.NodeID].LastSeenDays >= 365" class="text-right">Never</td>
+                      <td ng-if="stats[nodeCfg.NodeID].LastSeenDays < 365" class="text-right">{{stats[nodeCfg.NodeID].LastSeen | date:"yyyy-MM-dd HH:mm"}}</td>
                     </tr>
                   </tbody>
                 </table>