WebUI: Update torrent properties immediately

Don't wait for new data to be fetched, request them as soon as
they are required, i.e. when a property tab is loaded or when a
different torrent is selected.

src/webui/www/public/scripts/dynamicTable.js

@@ -220,7 +220,7 @@ var dynamicTable = new Class({
                             temptr.addClass('selected');
                         }
                         this.cur[0] = id;
-                        // TODO: Warn Properties panel
+                        updatePropertiesPanel();
                     }
                 }
                 return false;