Improving performance by turning a SingleChildScrollView into a ListView

[Skyost]

Is your feature request related to a problem? Please describe.
The current WeekView horizontal scrolling may be too expensive if there are too many dates because of the current system.

Currently the horizontal scrolling is managed by a SingleChildScrollView (see here) and DayViews with DayBars are in a Row (this allow to have an horizontal + vertical fixed header).

Describe the solution you'd like
Replacing the SingleChildScrollView by a ListView (whom out-of-viewport elements are not considered).

This can be done by swapping the role of vertical and horizontal scrolling.

Describe alternatives you've considered
Using a third party plugin, like horizontal_data_table or table_sticky_headers. But none really fits the needs of the plugin.

Additional context
None. Help is appreciated.