Add settings keyboard shortcut to v1.0.0

Sources/TonuinoManager/App/TonuinoManagerApp.swift

@@ -26,6 +26,10 @@ struct TonuinoManagerApp: App {
         }
         .commands {
             CommandGroup(replacing: .newItem) { }
+            CommandGroup(replacing: .appSettings) {
+                Button("Einstellungen…") { model.section = .settings }
+                    .keyboardShortcut(",", modifiers: .command)
+            }
             CommandGroup(after: .appInfo) {
                 Button("Auf Updates prüfen…") { AppDelegate.updater?.checkForUpdates(nil) }
                     .disabled(AppDelegate.updater?.updater.canCheckForUpdates != true)