Make instructors selectable in SectionSelect

[gannonprudhomme]

You should be able to select a professor in the SectionSelect's SECTION customization level, which would select/deselect all of the sections for that professor.

(insert design here)

[firejake308]

I have a couple designs for this in Figma, we can dicsuss these at 10/4 meeting

[rachelconn]

Here are the designs I made a couple weeks back, I believe we decided the left looked better but we should talk about it more before making a final decision:

Also the mockup Adel made (that includes icons), looks the best to me but would involve more changes: