Fix visibility of navigation bar when searching the forwarding screen. (#1357)

* Fix visibility of navigation bar when searching the forwarding screen.

- Update Introspect and replace deprecated calls with new ones.
- Remove obsoleted colours from DesignKit.

ElementX/Sources/Other/Extensions/List.swift

@@ -1,26 +0,0 @@
-//
-// 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 Introspect
-import SwiftUI
-
-extension View {
-    /// Finds a `UICollectionView` from a `SwiftUI.List`, or `SwiftUI.List` child.
-    /// Stop gap until https://github.com/siteline/SwiftUI-Introspect/pull/169
-    func introspectCollectionView(customize: @escaping (UICollectionView) -> Void) -> some View {
-        introspect(selector: TargetViewSelector.ancestorOrSiblingContaining, customize: customize)
-    }
-}