further refactor on background

Session/Media Viewing & Editing/MessageInfoView.swift

@@ -20,14 +20,7 @@ struct MessageInfoView: View {
     }
     
     var body: some View {
-        NavigationView {
         ZStack (alignment: .topLeading) {
-                if #available(iOS 14.0, *) {
-                    ThemeManager.currentTheme.colorSwiftUI(for: .backgroundPrimary).ignoresSafeArea()
-                } else {
-                    ThemeManager.currentTheme.colorSwiftUI(for: .backgroundPrimary)
-                }
-                
             ScrollView(.vertical, showsIndicators: false) {
                 VStack(
                     alignment: .leading,
@@ -352,7 +345,7 @@ struct MessageInfoView: View {
                 }
             }
         }
-        }
+        .background(themeColor: .backgroundPrimary)
     }
     
     private func showMediaFullScreen(attachment: Attachment) {

SessionUIKit/Style Guide/Themes/SwiftUI+Theme.swift

@@ -10,11 +10,17 @@ public extension View {
     }
     
     func background(themeColor: ThemeValue) -> some View {
+        if #available(iOSApplicationExtension 14.0, *) {
+            return self.background(
+                ThemeManager.currentTheme.colorSwiftUI(for: themeColor)?.ignoresSafeArea()
+            )
+        } else {
             return self.background(
                 ThemeManager.currentTheme.colorSwiftUI(for: themeColor)
             )
         }
     }
+}
 
 public extension Shape {
     func fill(themeColor: ThemeValue) -> some View {