Add feature to upload new image/file to current media item

[aalwash]

Type

• Feature

Problem description

You can't edit a media item, only edit title and/or remove the item.
So when a file is updated, you need to upload a new file and update all internal and external links

Steps to reproduce

• Upload image/file
• Go to edit image/file

Expected behavior / Proposed solutions

Add possibility to edit a image/file
For images, give the option to recrop new uploaded file? See issue #2475