• All apps: new icons based on Bootstrap icons
• All apps: new "fancy" theme, which can be enabled in user general preferences
• Admin: allow to mark users as hidden, to show them only to admins e.g. to hide functional users from regular users
• Status, Addressbook: preference to use first letters of username for avatar instead of initials
• Addressbook: show username for accounts as a column in the list too
• Addressbook: change title and role to 128 characters
• Mail: explicitly allow data-uris of arbitrary length for images (were shown as red questionmark, when longer then 800 chars)
• Mail: fix Sieve editor considers mail body rules wrongly as unconditional, if there are more than one rule
• All apps: fix private custom-fields were shown independent of entry type-filter, if user was allowed to see the field
• EPL/Mail/SpamTitan: allow admins to white- or blacklist for all users / whole domain