D-Net

Added support in the funding request workflow for book chapters

Added on emore section in the Statistics page

Added graphs for amounts of money spent and changed the structure of the statistics page

fixed an non existing error

- Made typesafe again
- Fixed a couple of NPEs

Catching a NPE

added funding in stats

Added a new Statistics menu item

When an action is performed by the moderator or the accounting officer, a confirmation modal appears with a textarea for inputing their comments (comment is now mandatory when performing an action). This happens in all cases except paid where the comment textbox is now inserted on the bank transfer modal

Added the link to the invoice to the request info heading in the accounting monitor pages