A bunch of random tweaks. (#3317)

- Fix warning on single case enum.
- Remove unused subjects.
- Fix a lint warning.
- Remove unused success value.
- Fix warning about position of try await.
- Add a note about the common tracing configuration.
- Show an indicator when resolving a send failure fails.
- Make sure the whole row is clickable in the GlobalSearchScreen.

ElementX/Sources/Screens/CallScreen/View/CallScreen.swift

@@ -200,7 +200,7 @@ private struct CallView: UIViewRepresentable {
         
         // MARK: - Picture in Picture
         
-        func requestPictureInPicture() async -> Result<AVPictureInPictureController, CallScreenError> {
+        func requestPictureInPicture() async -> Result<Void, CallScreenError> {
             guard let pictureInPictureController,
                   pictureInPictureController.isPictureInPicturePossible,
                   case .success(true) = await webViewCanEnterPictureInPicture() else {
@@ -208,7 +208,7 @@ private struct CallView: UIViewRepresentable {
             }
             
             pictureInPictureController.startPictureInPicture()
-            return .success(pictureInPictureController)
+            return .success(())
         }
         
         func stopPictureInPicture() {