Set night moder earlier in VC display

Prevents flash of day mode when the ViewController starts up.

writeas/ViewController.swift

@@ -12,6 +12,7 @@ class ViewController: NSViewController, NSTextViewDelegate, NSUserNotificationCe
 
     @IBOutlet var writerText: NSTextView!
 
+    var isNight = false
 
     override func viewDidLoad() {
         super.viewDidLoad()
@@ -30,6 +31,15 @@ class ViewController: NSViewController, NSTextViewDelegate, NSUserNotificationCe
         writerText.delegate = self
     }
 
+    override func viewWillAppear() {
+        super.viewWillAppear()
+
+        self.view.window!.titlebarAppearsTransparent = true
+        self.view.window!.isMovableByWindowBackground = true
+        self.view.window!.titleVisibility = .hidden
+        toggle(isNight: isNight)
+    }
+
     override func viewDidAppear() {
         super.viewDidAppear()
 
@@ -37,10 +47,6 @@ class ViewController: NSViewController, NSTextViewDelegate, NSUserNotificationCe
 
         // Style the window
         self.view.window!.title = "Write.as"
-        self.view.window!.titlebarAppearsTransparent = true
-        self.view.window!.isMovableByWindowBackground = true
-        self.view.window!.titleVisibility = .hidden
-        self.view.window!.backgroundColor = NSColor.white
     }
 
     func configureWindow() {
@@ -172,6 +178,7 @@ class ViewController: NSViewController, NSTextViewDelegate, NSUserNotificationCe
             self.writerText.backgroundColor = NSColor.white
             self.writerText.textColor = NSColor.black
         }
+        self.isNight = isNight
     }
 
     func adjustTextSize(increment: Bool) {