add support for custom messages in invitation emails through admin panel
remove testing code
store user language when submitting an invitation request, allowing localized emails
enable localization and email subject customization through templating
enable user language for sending localized emails
allow empty custom message when sending invitation email
rollback: move invitation with custom messages into another admin actions, and add a confirmation page when sending/resending invitations
Set default value when customizing invitation email
make custom message for invitation email replace the entire email body, instead of being a part of the default one
mention the {invite_link} placeholder in the form help text of the custom message field
allow rich forms adding form.media to the admin template (enable tinymce)
add bleach as dependency for cleaning HTML code in custom email body
a bit of cleanup + allow sending email preview to the administrator sending a custom email