### What?
Adjusts the `ChevronIcon` component to match the sizing of other icons
in the `ui` package. Also adds various styling adjustments to places
where icons are used.
### Why?
Using the `ChevronIcon` in other elements currently requires different
styling to make it consistent with other icons. This will make it so
that any usage of the any icons is consistent across components.
### How?
Resizes the `ChevronIcon` components and updates styling throughout the
admin panel.