Allow the Rules for fields in a Search Form to have the "Required" Action in the same way they do for a Submit Form.
In a Submit Form when you create a Rule it can have an Action to make a Field either Hidden, Disabled, or Required. On a Search Form the Required option is not available, but it would be nice to have. The option exists to directly set a Field to "Required" in both a Search or Submit Forms. It is just the functionality to so so dynamically via a Rule for a Field in a Search Form which is missing.