Add compose key command

Tusker/Controllers/MenuController.swift

@@ -10,21 +10,32 @@ import UIKit
 
 struct MenuController {
     
+    static func composeCommand() -> UIKeyCommand {
+        let selector: Selector
+        if #available(iOS 14.0, *) {
+            selector = #selector(MainSplitViewController.presentCompose)
+        } else {
+            selector = #selector(MainTabBarViewController.presentCompose)
+        }
+        return UIKeyCommand(title: "Compose", action: selector, input: "n", modifierFlags: .command)
+    }
+    
     static func refreshCommand(discoverabilityTitle: String?) -> UIKeyCommand {
         return UIKeyCommand(title: "Refresh", action: #selector(RefreshableViewController.refresh), input: "r", modifierFlags: .command, discoverabilityTitle: discoverabilityTitle)
     }
     
     static func buildMainMenu(builder: UIMenuBuilder) {
-        builder.insertChild(buildViewMenu(), atEndOfMenu: .view)
+        builder.insertChild(buildFileMenu(), atStartOfMenu: .file)
     }
     
-    private static func buildViewMenu() -> UIMenu {
+    private static func buildFileMenu() -> UIMenu {
         return UIMenu(
             title: "",
             image: nil,
             identifier: nil,
             options: .displayInline,
             children: [
+                composeCommand(),
                 refreshCommand(discoverabilityTitle: nil),
             ]
         )

Tusker/Screens/Main/MainSplitViewController.swift

@@ -56,6 +56,8 @@ class MainSplitViewController: UISplitViewController {
         
         tabBarViewController = MainTabBarViewController(mastodonController: mastodonController)
         setViewController(tabBarViewController, for: .compact)
+        
+        addKeyCommand(MenuController.composeCommand())
     }
     
     func select(item: MainSidebarViewController.Item) {
@@ -315,7 +317,7 @@ fileprivate extension MainSidebarViewController.Item {
 
 @available(iOS 14.0, *)
 extension MainSplitViewController: TuskerRootViewController {
-    func presentCompose() {
+    @objc func presentCompose() {
         let vc = ComposeHostingController(mastodonController: mastodonController)
         let nav = EnhancedNavigationViewController(rootViewController: vc)
         nav.presentationController?.delegate = vc

Tusker/Screens/Main/MainTabBarViewController.swift

@@ -156,7 +156,7 @@ extension MainTabBarViewController: FastAccountSwitcherViewControllerDelegate {
 }
 
 extension MainTabBarViewController: TuskerRootViewController {
-    func presentCompose() {
+    @objc func presentCompose() {
         let vc = ComposeHostingController(mastodonController: mastodonController)
         let nav = EnhancedNavigationViewController(rootViewController: vc)
         nav.presentationController?.delegate = vc