Summary:
On mobile view not all rows are rendered when a section is expanded.
Scrolly component calculates height of the GridView too soon (before animation is
completed). With this change on mobile view we always take the screen height for
calculation.
A similar bug was on Card List, where cards were squeezed and their height was
calculated to soon.
Test Plan: Added test
Reviewers: georgegevoian
Reviewed By: georgegevoian
Differential Revision: https://phab.getgrist.com/D3748
