Fix performance issues with Spaces on very large accounts #4898

- Support optional `MXSpace.room` property

Riot/Modules/Spaces/SpaceDetail/SpaceDetailViewController.swift

@@ -231,6 +231,9 @@ class SpaceDetailViewController: UIViewController {
         let membersString = membersCount == 1 ? VectorL10n.roomTitleOneMember : VectorL10n.roomTitleMembers("\(membersCount)")
         self.spaceTypeLabel.text = "\(joinRuleString) · \(membersString)"
         
+        let joinRuleIcon = parameters.joinRule == .public ? Asset.Images.spaceTypeIcon : Asset.Images.spacePrivateIcon
+        self.spaceTypeIconView.image = joinRuleIcon.image
+        
         self.inviterIdLabel.text = parameters.inviterId
         if let inviterId = parameters.inviterId {
             self.inviterTitleLabel.text = "\(parameters.inviter?.displayname ?? inviterId) invited you"