This reverts commit 5b9ee9f1, reversing
changes made to bb6c3845.

Newlines were only replaced with <br>'s in the mail body, but not in the configured layout for this mail. This resulted in missing newlines in the layout (everything was more or less in one line).

- Template filter
- Language Filter
- CSV Export

MailToSenderFinisher -> MailToUserFinisher
MailToReceiverFinisher -> MailToAdminFinisher
userName -> mailFromName

fix an issue that was introduced in my previous commit ac5026b5, where i moved the parent:saveFormAction to the bottom of our overriden saveFormAction, in order to save modified values back to the form defitinion. if a form has none of our finishers attached, the action is returns without calling the parentAction.

https://trello.com/c/bFMJWmLu/2251-sgmail-sgforms-anpassungen
If no custom template key was entered by the editor, a mix of the form & finisher identifier was used, to uniquely identify the mail template. This commit makes sure this value is also saved in the form configuration, so that the editor immediately sees the generated template name in the backend form editor.