Rework admin organization selector

[FestiveKyle]

Possible features:

• Modal for organization picker
• Show name, acronym, verified status
• Filter verified/unverified
• Searchable by name and acronym
• Show all orgs in list
• Have a recent area for 5-10 most recent orgs. Can store as something like adminOrgRecents on the user document
  • Remove org from recent if org deleted
  • Remove org from recent if affiliation changed below admin
  • Remove org from recent if affiliation removed
  • Create new mutation like ADD_RECENT_ADMIN_ORG to send when navigating to org information page
  • Add button to remove org from favourites with a click (no verification required)
  • Include accessedAt
  • Include toast message for action
  • Optional: Add undo to toast. Just recall ADD_RECENT_ADMIN_ORG again with the required details
• Have a favourites area. Can store as something like adminOrgFavourites on the user document
  • Remove org from favourites if org deleted
  • Remove org from favourites if affiliation changed below admin
  • Remove org from favourites if affiliation removed
  • Include favouritedAt
  • Include toast message for action
  • Optional: Add undo to toast