Portals; When using HTML Widget forms, it incorrectly calls a Portal Page's Form_IsDirty method if one exists

HTML Widgets forms such as the Admin, Branches form have, for some time, supported the concept of adding an asterisk to the form caption if data has been modified on the form.

This functionality relies on the page having a Form_IsDirty method and calling this at intervals.

This method was also being called for Portal pages which, since Intersoft are not in control of how the code is structured, may have caused issues.