[ticket/365] Move inline CSS rules of portal user icon to portal.css

B3P-365
[ticket/365] Move CSS of lines related to portal users icons to portal.css

B3P-365
[ticket/365] Use css classes in attachments module

B3P-365
[ticket/365] Add missing removal of inline css in edited files

B3P-365
Merge pull request #367 from marc1706/ticket/365

[ticket/365] Move inline CSS from HTML to CSS files