Allow for a scheduled end date/time when publishing lessons and Preview setting

[ShivanSarna]

For those who are offering free trials of courses or summits with a free viewing period. Both are offers I setup constantly for my clients so I know this is an automation that others are also having to manually contend with... 

Add an end date and time when the preview period expires for the entire course.
Setting - Course Preview - How lesson appears when previewing course Let them access this lesson
I just filed in git hub requesting a start and end time on this setting as I am currently having to manually start and stop the preview during the free viewing period. ugh. 

Also, would be great to have a start and end date on the publishing of a lesson...we are given a scheduled start date and time but what if we want to close the module or lesson.
 
enhancements that would make Simplero even more automated.