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/Other/SwiftUI/Backports.swift

@@ -8,12 +8,68 @@
 import SwiftUI
 
 extension View {
-    @ViewBuilder
-    func backportTabBarMinimizeBehaviorOnScrollDown() -> some View {
+    // MARK: iOS 18
+    
+    /// Uses the old page style modal so that on iPadOS 18 the presentation detents have no effect.
+    @ViewBuilder func backportPresentationSizingPage() -> some View {
+        if #available(iOS 18.0, *) {
+            presentationSizing(.page)
+        } else {
+            self
+        }
+    }
+    
+    /// A convenience modifier to conditionally apply `.navigationTransition(.zoom(…))` when available.
+    @ViewBuilder func backportNavigationTransitionZoom(sourceID: some Hashable, in namespace: Namespace.ID) -> some View {
+        if #available(iOS 18.0, *) {
+            navigationTransition(.zoom(sourceID: sourceID, in: namespace))
+        } else {
+            self
+        }
+    }
+    
+    /// A convenience modifier to conditionally apply `.matchedTransitionSource(…)` when available.
+    @ViewBuilder func backportMatchedTransitionSource(id: some Hashable, in namespace: Namespace.ID) -> some View {
+        if #available(iOS 18.0, *) {
+            matchedTransitionSource(id: id, in: namespace)
+        } else {
+            self
+        }
+    }
+    
+    @ViewBuilder func backportAccessibilityHint(_ hint: String, isEnabled: Bool) -> some View {
+        if #available(iOS 18, *) {
+            accessibilityHint(hint, isEnabled: isEnabled)
+        } else {
+            self
+        }
+    }
+    
+    // MARK: iOS 26
+    
+    @ViewBuilder func backportTabBarMinimizeBehaviorOnScrollDown() -> some View {
         if #available(iOS 26.0, *) {
             tabBarMinimizeBehavior(.onScrollDown)
         } else {
             self
         }
     }
+    
+    @ViewBuilder func backportScrollEdgeEffectHidden() -> some View {
+        if #available(iOS 26, *) {
+            scrollEdgeEffectHidden()
+        } else {
+            self
+        }
+    }
+}
+
+extension ToolbarContent {
+    @ToolbarContentBuilder func backportSharedBackgroundVisibility(_ visibility: Visibility) -> some ToolbarContent {
+        if #available(iOS 26.0, *) {
+            sharedBackgroundVisibility(visibility)
+        } else {
+            self
+        }
+    }
 }