SNZ-218 Add column count to schema table schema

code/editableformfields/tables/TwoColumnTableField.php

@@ -44,9 +44,14 @@ class TwoColumnTableField extends EditableFormFieldGroup
             $definition['headers'] = $this->getTableHeaderCells();
         }
 
+        $definition['columnCount'] = $this->getColumnCount();
+
         return $definition;
     }
 
+    /**
+     * @return int
+     */
     public function getColumnCount()
     {
         return $this->columnCount;