Fix order of indices in cell ids to be consistent with the old version.

activetable/activetable.py

@@ -153,7 +153,8 @@ class ActiveTableXBlock(StudioEditableXBlockMixin, XBlock):
             else:
                 row['class'] = 'odd'
             for cell in row['cells']:
-                cell.id = 'cell_{}_{}'.format(cell.index, row['index'])
+                cell.id = 'cell_{}_{}'.format(row['index'], cell.index)
+                cell.classes = ''
                 if not cell.is_static:
                     self.response_cells[cell.id] = cell
                     cell.classes = 'active'

activetable/static/js/src/activetable.js

@@ -33,7 +33,7 @@ function ActiveTableXBlock(runtime, element, init_args) {
         else if (data.num_total_answers == data.num_correct_answers) {
             $status.removeClass('incorrect').addClass('correct');
             $status.text('correct');
-            $status_message.text('Great job! ');
+            $status_message.text('Great job!');
         } else {
             $status.removeClass('correct').addClass('incorrect');
             $status.text('incorrect');