Add option for static icons

[Millais]

First of all, love the repo. Nice job.

It would be great if there was functionality similar to the Gmail app, where the icon stays static/in position on swipe, and doesn't move with the background.

Example: https://i2.wp.com/9to5google.com/wp-content/uploads/sites/4/2021/04/Gmail-swipe-icon-animation-2.gif?strip=info&w=480&ssl=1

[saket]

Sounds like a good idea. Wanna help me out by drafting a PR?