This feature is only usable if the e-mail will be sind right away,
so set $this->setIgnoreMailQueue(TRUE); otherwise, you need to hand
over a correct File and FileReference

[BUGFIX] Use default from address as to address to prevent crashes, Add the date for the auto-prefilled fields for send forms

[BUGFIX] Partial fix for all the language issues. At least take a proper ico code instead of a complete obscure language value.

[TASK] Remove double points in table mail markup

See merge request !38

[TASK] Render mails as tables, add some styling

See merge request !37

Bugfix 3288 missing icons in be modules

See merge request !34

https://trello.com/c/Oko9dZlm/3288-icons-in-backend-modules-are-broken

The icon viewhelper returns the surrounding markup already, we don't need it twice.

[TASK] Add mail preview function

See merge request !32

[TASK] update sys_language_uid in TCA & formatting

See merge request !31

[BUGFIX] Fix BS change of translationFile inclusions in TYPO3 10 but keep the old setting for TYPO3 9 compatibility

The userFunc was removed with dc00dbc1.
It used internal TYPO3 functions to display a simple list of the
available mail templates, so deleting the setting entirely should have no negative impact.