Add option to not set cursor on edit form

The standard behavior of an edit form is that the system tries to set the cursor on the first editable field that is not an option list (reason for not setting the cursor on an option list is that it is too easy to change its' value by accident).

This is normally fine but can be undesirable on complex, multi-action pages; for example where an edit form follows a list form.

A new tag has been added to the edit form action that, when the value evaluates to '1', overrules this standard behavior. The name of the tag is:

zXEditFormDoNotSetCursorOnFirstField

(Don't worry, it appears in the list of available tags in the repository editor).