[BUG] Function Check uploadFolder

[honsa]

Hello

The "Function Check" in the backend does not work like expected, if we have changed the uploadFolder path.

If the uploadFolder path is set via typoscript, the check should use the value from typoscript setup.

Now the check always uses the hardcoded default path.

https://github.com/in2code-de/powermail/blob/24853e38528dd565cd4834b74cfa677308e8abaa/Classes/Controller/ModuleController.php#L325

https://github.com/in2code-de/powermail/blob/0be104a343eceeb6689629150c311c3d1ca802f5/Classes/ViewHelpers/Be/UploadsFolderViewHelper.php#L28

https://github.com/in2code-de/powermail/blob/0be104a343eceeb6689629150c311c3d1ca802f5/Resources/Private/Language/locallang.xlf#L527