Mail sending

* adds mail sending logic for new notification setting
* adds new templates for user and team based sending
* enhances all email template layout
* adds translations

user/models/team.py

@@ -95,6 +95,20 @@ class Team(UuidModel, DeletableObjectMixin):
         mailer = Mailer()
         mailer.send_mail_shared_data_checked_team(obj_identifier, obj_title, self)
 
+    def send_mail_deduction_changed(self, obj_identifier, obj_title, data_changes):
+        """ Sends a mail to the team members in case of changed deduction values
+
+        Args:
+            obj_identifier (str): Identifier of the main object
+            obj_title (str): Title of the main object
+            data_changes (dict): Contains the old|new changes of the deduction changes
+
+        Returns:
+
+        """
+        mailer = Mailer()
+        mailer.send_mail_deduction_changed_team(obj_identifier, obj_title, self, data_changes)
+
     def send_mail_shared_data_deleted(self, obj_identifier, obj_title):
         """ Sends a mail to the team members in case of deleted data