[Dashboard] new widget: `Recent updates` or `News` based on DocRepo widget

[christinerogers]

Christine's idea from Loris meeting - generally agreed a good potential GSOC project:

Copy the Doc Repo updates panel on the Dashboard to make a new element that shows latest Projects/datasets added.
This panel should be configurable - turn on/off in the Config module.

Permissions/visibility: generally should be visible to all.
Configuration could include these 2 options:
a- respect project permissions for the user (they won't see any projects they aren't already affiliated to)
b- for data discovery: Show all (new) projects regardless of user affiliations (so they can request access, e.g.)

why: For open science projects (not active studies), it's useful to show "what's new" and better use side-panel space on the Dashboard.
Ideally this space could be used to list automatically the latest projects/datasets added, with a link to the profile of the dataset, candidate count, maybe a list of modalities.
Ideally you could click through to see a profile of the dataset (similar either to the EEGNet dashboard panel, or to CCNA"s Data Access page), or as a default, to the Candidate Profile page pre-filtered for that Project/dataset

Expected to be useful to: EEGNet, C-BIG, maybe CCNA, other open science repositories

Note: @samirdas says something similar was done for NIHPD, and it took a lot of manual updates (fair caveat). Looking forward to your comments on this if anything comes to mind.

[christinerogers]

Ayush, don't hesitate to ask clarifying questions or propose ideas here.
e.g. Looking at Raisinbread and across the database tables, what fields could used as the best measure of when a Project / dataset was added (so we can tell which ones were added recently)

[christinerogers]

This is @ay-bh 's next project as soon as he is ready with the Issue Tracker changes. Still valid and priority.