Inconsistent display of nulls in Reconciler

Display of "null AS x" element in the reconciler is inconsistent.

1) In ModelExplorer, create a new view. Open the TEditor.
2) In TEditor, enter "SELECT null AS x" , then save.
3) Open the Reconciler. In the bindings table, the SQL symbol is displayed as "?expr AS X : null"
4) Unbind, then delete the SQL Symbol.
5) select the table row, then click "< Null" button. Now the symbol in the table is displayed as "c null AS X : null". The SQL is unchanged.