Support pagination in the Space Summary API

- Update after review

Riot/Modules/Spaces/SpaceRoomList/ExploreRoom/PaginationLoadingViewCell.swift

@@ -0,0 +1,32 @@
+// 
+// Copyright 2021 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import UIKit
+import Reusable
+
+class PaginationLoadingViewCell: UITableViewCell, NibReusable, Themable {
+    
+    // MARK: - Properties
+    
+    @IBOutlet var activityIndicator: UIActivityIndicatorView!
+    
+    // MARK: - Public
+    
+    func update(theme: Theme) {
+        self.activityIndicator.tintColor = theme.colors.tertiaryContent
+        self.activityIndicator.startAnimating()
+    }
+}