Add Chips, InputStyles, Service Implementation, swift-collections and UI cleanup.

Riot/Modules/Settings/Notifications/Model/NotificationIndex.swift

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+// 
+// 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 Foundation
+
+/**
+ Index that determines the state of the push setting.
+ Silent case is un-unsed on iOS but keepingin for consistency of
+ definition across the platforms.
+ */
+enum NotificationIndex {
+    case off
+    case silent
+    case noisy
+}
+
+extension NotificationIndex: CaseIterable { }
+
+extension NotificationIndex {
+    /**
+     Used to map the on/off checkarks to an index used in the static push rule definitions.
+     */
+    static func index(enabled: Bool) -> NotificationIndex {
+        return enabled ? .noisy : .off
+    }
+    
+    /**
+     Used to map from the checked state back to the index.
+     */
+    var enabled: Bool {
+        return self != .off
+    }
+}