build extra tab for control and status

[eriktks]

Build new extra browser tab with control information and status information of PDF download in table, for example:

1. DOI
2. associated publisher url
3. associated PDF link
4. status of download: Success, Requires click to download (see issue respect robots.txt #1 ), Failure

[ermannolocascio]

Nice. I'd like to elaborate a bit more on it. For istance: the new tab will contain a "conventional" web page (HTML, CSS, JavaScript) showing the info you mentioned?

Tbd