SNZ-207 Added isTableCell to json definition of fields in tables

code/editableformfields/tables/EditableTableRow.php

@@ -37,8 +37,8 @@ class EditableTableRow extends EditableFormFieldGroup
         $definition = parent::getFieldDefinition();
         $definition['type'] = 'table-row';
 
-        foreach($definition['fields'] as $field) {
-            $field['isTableCell'] = true;
+        foreach($definition['fields'] as $name => $field) {
+            $definition['fields'][$name]['isTableCell'] = true;
         }
 
         unset($definition['fieldDisplayFormat']);