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/Timeline/View/ItemMenu/TimelineItemMenu.swift

@@ -52,7 +52,7 @@ struct TimelineItemMenu: View {
             }
         }
         .accessibilityIdentifier(A11yIdentifiers.roomScreen.timelineItemActionMenu)
-        .presentationPage()
+        .backportPresentationSizingPage()
         .presentationDetents([.medium, .large])
         .presentationBackground(Color.compound.bgCanvasDefault)
         .presentationDragIndicator(.visible)
@@ -251,17 +251,6 @@ private extension EncryptionAuthenticity {
     }
 }
 
-private extension View {
-    /// Uses the old page style modal so that on iPadOS 18 the presentation detents have no effect.
-    @ViewBuilder func presentationPage() -> some View {
-        if #available(iOS 18.0, *) {
-            presentationSizing(.page)
-        } else {
-            self
-        }
-    }
-}
-
 // MARK: - Previews
 
 struct TimelineItemMenu_Previews: PreviewProvider, TestablePreview {