popovers: Remove the "Manage this user" link for deactivated users.
popovers: Remove the "Manage this user" link for deactivated users.

The "Manage this user" link did not work correctly for deactivated
users.

Fixes part of #21428.

zulip/zulip,rht/zulip,kou/zulip,zulip/zulip,andersk/zulip,zulip/zulip,zulip/zulip,rht/zulip,rht/zulip,andersk/zulip,rht/zulip,andersk/zulip,zulip/zulip,rht/zulip,kou/zulip,zulip/zulip,rht/zulip,kou/zulip,kou/zulip,andersk/zulip,kou/zulip,andersk/zulip,kou/zulip,zulip/zulip,andersk/zulip,andersk/zulip,kou/zulip,rht/zulip