[F-R] Usable scrollbar within chapter reader view

[InInfinitumEtInTenebris]

Is your feature request related to a problem? Please describe. Ability to use the scrollbar within a chapter's reader view. Eg. similar to the scrollbar that the chapter list uses. Used for scrolling through a chapter easier.

Describe the solution you'd like Usable scrollbar within a chapter reader view. Similar to chapter list scrollbar

Describe alternatives you've considered I do not believe there is a sufficient alternative for this enhancement.

Additional context I believe this enhancement is sufficiently explained.