New parameters are available at level Visit Pass with Guide, operator could add some default margin before and after a visit group.
Once defined margins for visit pass, and sell this Visit pass, the margin are filled by default, operator could modify it if needed.
And a guide who was assigned to this visit group, will be display in yellow as "Not available due to margin restriction" for the next visit group.
However, operator could any time assign this guide to the Visit group if needed.
