Add FileWidget.FILE_AND_DIRECTORY_STYLE

[tischi]

No description provided.

[NicoKiaru]

Quick note to mention that the documentation in imagej.net needs to be updated once the PR is merged:

https://imagej.net/scripting/parameters

[NicoKiaru]

Also, instead of "both", maybe something like "file_or_directory", since "both" isn't very clear out of context.
Last, how does this behave with a file array parameter ?

[tischi]

I am using "both" because that's what is already used for the FileListWidget.

[NicoKiaru]

Ah great! Then the FileArray widget is already working. Good to know!

[imagejan]

Thanks @tischi!

Looks good to me, I just added suggestion to remove one of the TODO comments.

[tischi]

Thanks @imagejan, these TODO were not added by me, but what you did LGTM.

Do I need to accept/commit your changes or can you do it?

[ctrueden]

Thanks, all!