dateClause() in Form.php doesn't add table reference to field

When making a custom report, the SQL would error because the field 'end_date' in the WHERE clause did not have a table alias appended to it, so the system could not decide which 'end_date' was being referenced. It appears the dateClause() function in Form.php (lines 1261 to 1268) is the culprit.

I was able to get around it by including the table alias in the fieldName string passed in, but this only fixes it for this particular custom report.. it will still occur if anyone uses any of the current reports as a template. It would seem to make sense to have dateClause() provide this functionality, as it has access to the information.

I can work on a fix for this, as it seems straightforward, but I wanted to check whether it was fixed in a future version (from 4.2.6) already first.