labeling or deletion of multiple documents

[karlsebal]

At the moment it is possible to select multiple documents by holding the shift key but there is nothing you can do with it.

It would be nice if it would be possible to select multiple documents and be able to delete or label all at once.

[jflesch]

there is nothing you can do with it.

Actually, it allows to export them all in one shot. But yes, it must still be extended to other features.
@mjourdan has been working on some interesting ideas and mockups regarding multiple selections of pages and documents.

[mjourdan]

Issues related to multiple selection and mass export are referenced in #654. I tried to update the wireframes for mass labelling. Feel free to comment, folks!