Fix "progress" behavior for upgrade page

per recent changes to progress page, whoops

tailbone/templates/upgrade.mako

@@ -25,7 +25,7 @@
                           $('#total').html('('+data.maximum_display+' total)');
                           $('#cancel button').show();
                           if (data.complete) {
-                              clearInterval(updater);
+                              stillInProgress = false;
                               $('#cancel button').hide();
                               $('#total').html('done!');
                               $('#complete').css('width', '100%');
@@ -45,6 +45,13 @@
                               $('#remaining').css('width', 'auto');
                           }
                       }
+
+                      if (stillInProgress) {
+                          // fetch progress data again, in one second from now
+                          setTimeout(function() {
+                              update_progress();
+                          }, 1000);
+                      }
                   }
               }
           });