Preferences: more clearly indicate the binary between the minimap and scrollbar

### Problem

At the moment we present the minimap as something that is turned on via a switch, but this doesn't clearly communicate that it replaces the scrollbar as the scroll indicator in the view

### Proposal

Perhaps the design of this preference should more clearly indicate a choice between scrollbar and minimap using a modeswitch or radiobuttons or something that has more explicit implication that choosing one means not choosing the other

### Prior Art (Optional)

_No response_