Pass maintainVisibleContentPosition through to calendar-list

[siggi-livekindred]

Problem

A component with large days (month height > const CALENDAR_HEIGHT = 360) or variable sized months still has janky scrolling.

Previously reported in #1881 but closed as stale.

Solution

Providing maintainVisibleContentPosition to the FlatList fixes this issue, at least in my case

        <CalendarList
            ...
            maintainVisibleContentPosition={{
              minIndexForVisible: 0,
            }}
       />

This is already a prop on CalendarList, inherited and not omitted from FlatListProps.

Ask

Update the component to pass through the maintainVisibleContentPosition prop.

Jumping visualized

repro.mov