Polish profiles-page

[hmpf]

At least:

• Add header
• Center
• Add vertical spacing between profiles #1115
• Use <button> instead of <p><a>...<a/><p/> #1092
• Remove separate page for details, use form instead of text everywhere
• Make Delete-button a modal
• Polish Python for rendering the form
  • Replace all inputs for ManyToManyFields with htmx/forms/dropdown_select_multiple.html #1096
  • Daisyfy all inputs in form

Page added in #1095

Extra tasks:

• Edit one field at a time with click-to-edit with HTMx