My Dashboard: first load 5 most active spaces

[SimoneZaza]

Description

As a team member I don't want my dashboard to take 7 seconds to load when I'm giving a demo. This is not a great experience for people watching and it's overloading the server.

Acceptance criteria

• Sort the Spaces on most recent activity. (It doesn't matter if the activity was in space or related subspace) (this is currently already the case?)
• Do the same for the subspaces inside the spaces blocks
• If there are multiple spaces/subspaces listed that the user didn't visit/contributed to, sort these by other people's most recent activity. If this takes more than 15 minutes, disregard this last AC, the sorting on those spaces isn't a priority.
• Load just the first 5 spaces when a user navigates to the dashboard
• When there are more than 5 spaces, add button "Show all" (primary color, filled, horizontally centered).
  • Clicking on this button should load the rest of the Spaces on the page

Additional Context

Screen shots / UX designs / data that are relevant.

Areas that will be affected

To be added during the refinement