Ref. PG02-4

Is your feature request related to a problem? Please describe.
As a visitor I want a quick way to see the activity of all the processes inside the PG.

Describe the solution you'd like
To have implemented Statistics for all the PG, with the sum of every one of the Resources/Components in every Participatory Process.

Describe alternatives you've considered
To use Metrics as they give more data and are more visual (with graphics), but the Metrics features not work well (they have issues with showing the last dates instead of what makes sense on a Participatory Process, such as taking in account the beginning and finishing of the PP).

To have the unique sum in the case of Participants, but that would be difficult to understand.

Additional context
Statistics on a Participatory Process:

Does this issue could impact on users private data?
No

Acceptance criteria

• As a visitor I can see the Statistics for a PG in its homepage
• As an administrator I want to be able to decide whether or not to display the statistics on this page.