Review checkmark on upload/adding properties

Change green checkmark after the metadatas are applied to avoid confusion with file upload progress.

The idea here is that the green checkmark could be misinterpreted as upload status and currently we are not showing the status of the upload (other than the progress bar) on this modal. One possible solution may be to change the color of the title to nuxeo-text-default to mark those that are already validated, those still waiting for validation would have the title in gray as is now. And changing the checkmark to a remove action as we have on the previous screen so the behavior while adding properties would be as on the previous screen when dropping the files on the dropzone. All files would have an action to be removed/cancel and clicking here will remove it from this list). This would make this screen more consistent with the previous one. Adding to this, we need a way to ask confirmation from the user when trying to remove a file since it's an irreversible action.