Fix collection management and match some json output (#5095)

- Fixed collection management to be usable from the Password Manager UI
- Checked and brought in-to-sync with upstream several json responses
- Fixed a small issue with the `fields` response when it was empty

Signed-off-by: BlackDex <black.dex@gmail.com>

src/db/models/group.rs

@@ -82,7 +82,7 @@ impl Group {
                     "id": entry.collections_uuid,
                     "readOnly": entry.read_only,
                     "hidePasswords": entry.hide_passwords,
-                    "manage": *user_org_type == UserOrgType::Manager && !entry.read_only && !entry.hide_passwords
+                    "manage": *user_org_type >= UserOrgType::Admin || (*user_org_type == UserOrgType::Manager && !entry.read_only && !entry.hide_passwords)
                 })
             })
             .collect();