[Advanced Checklist (Alpha)] Scrolling and unreadable entries on iOS

[MustachedMario]

I know this editor is in alpha state and have some quirks. I just want to report things I noticed while using it on mobile app (iOS).

• Greyed-out / completed entries - The comleted enties are visible unreadable, because the greyed out color are too bright with the default blue theme.
• Scrolling behavior. Scrolling feels unnatural, like there is a active handbrake. (btw this behavior is also present in "token editor", and was a long time in the "basic markdown" editor. you fixed this in the "basic markdown" editor for around 2 years ago. (Issue#14)
• Animations + Delay - The animations are very long (e.g. 3 seconds to complete a task). This animation delay also delays saving changes.

edit: typos