Converts AppDefaults to singleton

Multiplatform/macOS/Preferences/View/AdvancedPreferencesView.swift

@@ -0,0 +1,49 @@
+//
+//  AdvancedPreferencesView.swift
+//  macOS
+//
+//  Created by Stuart Breckenridge on 27/6/20.
+//
+
+import SwiftUI
+
+struct AdvancedPreferencesView: View {
+    
+	@EnvironmentObject private var preferences: AppDefaults
+    
+    var body: some View {
+        VStack {
+            Form {
+                Toggle("Check for app updates automatically", isOn: $preferences.checkForUpdatesAutomatically)
+                
+                Toggle("Download Test Builds", isOn: $preferences.downloadTestBuilds)
+                HStack {
+                    Spacer()
+                    Text("If you’re not sure, don't enable test builds. Test builds may have bugs, which may include crashing bugs and data loss.").foregroundColor(.secondary)
+                    Spacer()
+                }
+                
+                HStack {
+                    Spacer()
+                    Button("Check for Updates", action: {})
+                    Spacer()
+                }.padding(.vertical, 12)
+                
+                
+                Toggle("Send Crash Logs Automatically", isOn: $preferences.sendCrashLogs)
+                
+                Spacer()
+                HStack {
+                    Spacer()
+                    Button("Privacy Policy", action: {})
+                    Spacer()
+                }.padding(.top, 12)
+                
+                
+            }
+            Spacer()
+        }.frame(width: 300, alignment: .center)
+    }
+    
+}
+