Consider tweaking apps v2 to minimise the page load impact from slow api calls

[enekofb]

This PR introduced apps v2 with explorer backend and there is a piece of the experience
that does calls to v1/objects api endpoint ending up on slower page load than for example sources or explorer.

Given that the work on this workstream is about improving (among other topics) page load

This ticket to consider whether

• does it matters in terms of UX? is the user thinks that the page does not loads fast enough?
• in case that it matters, apply a fix

[jpellizzari]

There is one call that holds up the whole page. We should try to make that non blocking if possible.