Rename "Last File Synced" to "Last File Received" (fixes #1145)

IMHO this is more clear

gui/index.html

@@ -155,7 +155,7 @@
                       <td class="text-right">{{sharesFolder(folder)}}</td>
                     </tr>
                     <tr ng-if="folderStats[folder.ID].LastFile">
-                      <th><span class="glyphicon glyphicon-transfer"></span>&emsp;<span translate>Last File Synced</span></th>
+                      <th><span class="glyphicon glyphicon-transfer"></span>&emsp;<span translate>Last File Received</span></th>
                       <td class="text-right">
                         <span title="{{folderStats[folder.ID].LastFile.Filename}} @ {{folderStats[folder.ID].LastFile.At | date:'yyyy-MM-dd HH:mm'}}">
                           {{folderStats[folder.ID].LastFile.Filename | basename}}