This PR adds a new `restrict_scroll_to_axis` style to allow consumers to
opt-in to the scrolling behavior found on the web.
When this is enabled the behavior will be such that:
- Scrolling using the mouse wheel will only scroll the Y axis
- Scrolling using the mouse wheel with <kbd>Shift</kbd> held will only
scroll the X axis
This behavior is useful in scenarios where you have some
vertically-scrollable content that is interspersed with
horizontally-scrollable elements, as otherwise the scroll will be
constantly hijacked by the horizontally-scrollable elements while trying
to scroll up and down in the vertically-scrollable container.
I think that this behavior should be the default, but it's a bit of a
sweeping change to make all at once, so for now it remains opt-in.
Release Notes:
- N/A
Marshall Bowers
7321c814ce