A couple of small tweaks. (#4569)

* Stop ignoring the safe area with the suggestions view.

They weren't visible on iPad (hidden behind the sidebar) and I can't find any instance when they're shown where the safe area comes into play.

* Make sure the room list deselects the cell when dismissed a room.

* Use the backports pattern in more places.

* Fix the annoying header on macOS.

* Silence some warnings

* Fix compound CI branch name.

ElementX/Sources/Screens/RoomScreen/ComposerToolbar/View/CompletionSuggestionView.swift

@@ -99,7 +99,6 @@ private struct BackgroundView<Content: View>: View {
             .clipShape(RoundedCornerShape(radius: shadowRadius, corners: [.topLeft, .topRight]))
             .shadow(color: .black.opacity(0.20), radius: 20.0, x: 0.0, y: 3.0)
             .mask(Rectangle().padding(.init(top: -(shadowRadius * 2), leading: 0.0, bottom: 0.0, trailing: 0.0)))
-            .edgesIgnoringSafeArea(.all)
     }
 }