Release 7.4.5 (lmn74)

 changing them.

• Disable default (global) fields for schooladmins; i18n for character
  classes.
• Catch backend validation errors properly and cap require_classes count
  to the number of checked classes. Fix #289.
• Print passwords of parents in schools other than the default school.
  Fix #288.
• Ensure host_key key is not missing; restart API after saving a new key.
• Replace password/settings modals with a better dialog window.
• Build fix for the bind passwords view; fix default values.