Add change request inbox and discoverability for owners

[pedrogaudencio]

Problem

Even if change requests exist, owners may miss them or have no central place to manage incoming proposals.

Solution

Create a “Change request” view for owners - next to "View modes" and "Explore" - so that requests are easy to manage.

[eighttrigrams]

@pedrogaudencio we have that now, right?
see screenshot here

[pedrogaudencio]

Oh that's right @eighttrigrams! I actually thought we'd have a different UI for this. 🤔 If @pieer or @taoeffect confirm then we can close this one. 👍