Prepopulate fields when creating a new item

Please let us set default new values for new items in the settings!

In particular:

  • A default username: either a default string (email or simple username) or a plus-addressed email generated from the domain name
  • Default settings for password generation (Ideally not coming from the current settings of the generator tab since if we happened to generate a weak password once to comply with a bad password policy, we don’t want all our future passwords to be weak. It might be a nice idea to always reset the generator settings from those default values though!)
  • The possibility to create default custom fields, empty or not. The user can choose the field names, but they would for example be used to add an “email” field, or another “Username” field if they like to write the email in the “Username” field.