Add CustomRoundedButton: Button to customized from the outside.

Riot/Modules/Common/Buttons/CustomRoundedButton.swift

@@ -0,0 +1,45 @@
+// 
+// Copyright 2020 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
+
+class CustomRoundedButton: UIButton {
+    
+    // MARK: - Constants
+    
+    private enum Constants {
+        static let cornerRadius: CGFloat = 6.0
+        static let fontSize: CGFloat = 17.0
+    }
+    
+    // MARK: Setup
+    
+    override init(frame: CGRect) {
+        super.init(frame: frame)
+        self.commonInit()
+    }
+    
+    required init?(coder: NSCoder) {
+        super.init(coder: coder)
+        self.commonInit()
+    }
+    
+    private func commonInit() {
+        self.layer.masksToBounds = true
+        self.titleLabel?.font = UIFont.systemFont(ofSize: Constants.fontSize)        
+        self.layer.cornerRadius = Constants.cornerRadius
+    }
+}