Activate a form in specific dates

[nuria2c]

It could be very usefull a new feature to setup specific "Active" state between dates for each form.
Now you can set "Yes" or "No" in the "Active" state of the form.
A new state like "Active for a period" and then add the possibily to set up start and end date of the "Active" state it could be very useful for us.
And also a text area to inform extra data if is needed.