The edit selections modal's size was too big for the page and scroll didn't work. It was dysfunctional on mobile, and the close button's position was getting pushed below the header.
This PR:
adjusts the size of the modal on mobile
allows the scroll
fixes the close button position to always be in horizontal line with the header
sticky's the header on scroll, so the close button is always clickable on screen
The edit selections modal's size was too big for the page and scroll didn't work. It was dysfunctional on mobile, and the close button's position was getting pushed below the header.
This PR: