Add info about the timeframe for the 4 top widget of the dashboard

[SamuelHassine]

Description

Today we don't know that the 4 top widgets of the homepage retrive data on the last 180 days, we need to clarify this behavior to avoid the following type of confusion:

14 simulations:

0 in dashboard:

[guillaumejparis]

To prevent performance issues, we currently limit fetching to the past 180 days for dashboard statistics.
To maintain performance while avoiding penalties for instances with no activity in the past six months, we could consider limiting the fetch to the last 100 simulations. wdyt @EllynBsc @jborozco ?

[RomuDeuxfois]

We can show to the user the limit taken -> 180 days.
Even if it means adding a date filter and leaving it up to the user to change it.

[EllynBsc]

Hey @guillaumejparis @RomuDeuxfois 👋

As it is an edge case, I'd rather add some code than change the UI.
Could we add a condition like the following

 if there is no activity for the past six month
   fetch the last 100 simulations 

[RomuDeuxfois]

@EllynBsc If we do that, we don't always have the same behavior on the same widget depending on the data we find. I find that a bit weird.

Note: all widgets are based on a time window.

[EllynBsc]

@RomuDeuxfois good point. Ok then let's go for your solution:

• We show the user the limit taken -> 180 days.
• We add a date filter and let the user change it accordingly

[EllynBsc]

After discussion with @jborozco @RomuDeuxfois @guillaumejparis @Dimfacion, we'll focus on the first solution/workaround: display to the user that we show the activity < 180 days.

[jborozco]

here is a mockup