Seen Posts: Toggle to disable on-hover behavior

[marcustyphoon]

Discussed in https://github.com/AprilSylph/XKit-Rewritten/discussions/456

^{Originally posted by marcustyphoon February 7, 2022} I personally would prefer if Seen Posts' dimming behavior was permanent, rather than being temporarily disabled by hovering over a dimmed post with the mouse, as apparently I tend to leave it on the timeline whenever I scroll and things get very flickery then. A toggle for this behavior would be nice!