Add results display settings in user profile page

Users should be able to manage wich columns they are viewing in search results.

In their profile page, add a settings menu to select which standard fields they would like to see.

To-do:

• Use settings on results page load
  • Check if user has settings in USERS_RESULTS_SETTINGS table
  • If not, use standard defaults
• Add a way for super-admins to choose standard default
  • Add a column in Std_fields table
  • Add an interface in Fields table on Portal tool
  • Add endpoints
• Add a "Search tool settings" section in user profile page
  • Add a "Results display settings" section
    • Add a multi-choice select input with every standard field
    • Add a "Save" button
• Store settings in database
  • Create endpoint in user API