Switch to weakAssign for all AppSettings listeners

ElementX/Sources/Other/Extensions/Publisher.swift

@@ -0,0 +1,25 @@
+//
+// Copyright 2023 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 Combine
+
+extension Publisher where Self.Failure == Never {
+    func weakAssign<Root: AnyObject>(to keyPath: ReferenceWritableKeyPath<Root, Self.Output>, on object: Root) -> AnyCancellable {
+        sink { [weak object] value in
+            object?[keyPath: keyPath] = value
+        }
+    }
+}