Filtering Participants

Hi, I have a suggestion for improvement:

In drop-down menus—such as those for participants, or other places where people or options are listed—could it be set up so that the selected people or options appear at the top of the list?

For example, on a form listing participants, it takes a lot of scrolling to find which people are listed as participants on the form. Especially when the list has more than 50 people...