Allow specifying the error message for disallowed mimeTypes

[darinda]

Symfony allows for specifying the error message that will be shown when the user selects a file of a mime type that is disallowed (https://symfony.com/doc/current/reference/constraints/File.html#mimetypesmessage)

It would be nice to be able to define that error message on content type level in the admin interface.

[darinda]

Implemented in https://github.com/darinda/NetgenEnhancedBinaryFileBundle/commit/826f21b3ff27ea3bae214926024b8d7ee2447a13
But PR #11 should be merged first.

[MarioBlazek]

@darinda, please create PR based on the code from your fork. Just one notice, maybe a better solution would be to use mimeTypeMessage from translation file rather than saving/reading it from the database.

[darinda]

@MarioBlazek PR has been created. I moved the mimeTypeMessage to the database because it can be translated there. ContentTypes can be translated, so i think this is the correct place to put them.

That way the mimeTypeMessage can be specified like "Please upload only PDF documents!" instead of having the standard symfony message stating something about the mime types which a normal end user won't be able to understand.

[emodric]

Hm, that might make sense. What happens if we leave it to an empty value?

[darinda]

What happens if we leave it to an empty value?

Then symfony's default error message will be displayed, as it was before this pull request.

So The mime type of the file is invalid ({{ type }}). Allowed mime types are {{ types }}.

[darinda]

@emodric bump ;)

[emodric]

I've left a couple of comments on #13.

Otherwise, if everything works, I'm +1 for merging.

@MarioBlazek What do you think?