Launch application in background from launcher

Requires disabling sandbox for launcher to receive arguments.

https://developer.apple.com/documentation/appkit/nsworkspace/openconfiguration/3172708-arguments

Refine some minor things about launcher:

- Pass invoker to NSApp.terminate() calls

- Use legacy version of .openApplication() to drop Concurrency

Passepartout/App/AppDelegate.swift

@@ -33,6 +33,9 @@ class AppDelegate: NSObject, UIApplicationDelegate, ObservableObject {
         #if targetEnvironment(macCatalyst)
         mac.configure()
         mac.menu.install()
+        if ProcessInfo.processInfo.arguments.contains(Constants.Global.appArgumentBackground) {
+            mac.utils.sendAppToBackground()
+        }
         #endif
         return true
     }

Passepartout/Constants.swift

@@ -44,5 +44,7 @@ enum Constants {
         static let appBuildNumber = Int(Bundle.main.infoDictionary![kCFBundleVersionKey as String] as! String)!
 
         static let appVersionString = "\(appVersionNumber) (\(appBuildNumber))"
+
+        static let appArgumentBackground = "-background"
     }
 }

Passepartout/Launcher/AppDelegate.swift

@@ -37,18 +37,18 @@ class AppDelegate: NSObject, NSApplicationDelegate, ObservableObject {
 
     func applicationDidFinishLaunching(_ notification: Notification) {
         guard !isAppRunning else {
-            NSApp.terminate(nil)
+            NSApp.terminate(self)
             return
         }
-        Task {
-            do {
-                let cfg = NSWorkspace.OpenConfiguration()
-                cfg.hides = true
-                try await NSWorkspace.shared.openApplication(at: appURL, configuration: cfg)
-            } catch {
+        let cfg = NSWorkspace.OpenConfiguration()
+        cfg.hides = true
+        cfg.arguments = [Constants.Global.appArgumentBackground]
+        NSWorkspace.shared.openApplication(at: appURL, configuration: cfg) { app, error in
+            if let error = error {
                 NSLog("Unable to launch main app: \(error)")
+                return
             }
-            await NSApp.terminate(nil)
+            NSApp.terminate(self)
         }
     }
 }

Passepartout/Launcher/Launcher.entitlements

@@ -2,9 +2,7 @@
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
 <dict>
-    <key>com.apple.security.app-sandbox</key>
-    <true/>
-    <key>com.apple.security.files.user-selected.read-only</key>
-    <true/>
+	<key>com.apple.security.app-sandbox</key>
+	<false/>
 </dict>
 </plist>