New App Layout: Added missing empty states in room list and space bottom sheet

Riot/Modules/Common/Recents/Views/RecentEmptySectionTableViewCell.swift

@@ -0,0 +1,59 @@
+// 
+// Copyright 2022 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
+
+/// `RecentEmptySectionTableViewCell` can be used as a placeholder for empty sections.
+class RecentEmptySectionTableViewCell: UITableViewCell, NibReusable, Themable {
+    
+    @IBOutlet private var iconBackgroundView: UIView!
+    @IBOutlet var iconView: UIImageView!
+    @IBOutlet var titleLabel: UILabel!
+    @IBOutlet var messageLabel: UILabel!
+    
+    @objc static func defaultReuseIdentifier() -> String {
+        return reuseIdentifier
+    }
+    
+    // MARK: - Life cycle
+    
+    override func awakeFromNib() {
+        super.awakeFromNib()
+
+        self.iconBackgroundView.layer.cornerRadius = self.iconBackgroundView.bounds.height / 2
+        self.iconBackgroundView.layer.masksToBounds = true
+        
+        self.selectionStyle = .none
+        
+        update(theme: ThemeService.shared().theme)
+    }
+
+    // MARK: - Themable
+    
+    func update(theme: Theme) {
+        self.backgroundColor = theme.colors.background
+        
+        self.iconBackgroundView.backgroundColor = theme.colors.quinaryContent
+        self.iconView.tintColor = theme.colors.secondaryContent
+        
+        self.titleLabel.textColor = theme.colors.primaryContent
+        self.titleLabel.font = theme.fonts.title3SB
+        
+        self.messageLabel.textColor = theme.colors.secondaryContent
+        self.messageLabel.font = theme.fonts.callout
+    }
+}