Fix the layout HUD when multiple screen are arranged vertically (#1162)

Amethyst/Managers/ScreenManager.swift

@@ -313,7 +313,7 @@ final class ScreenManager<Delegate: ScreenManagerDelegate>: NSObject, Codable {
             return
         }
 
-        let screenFrame = screen.frameIncludingDockAndMenu()
+        let screenFrame = screen.frame()
         let screenCenter = CGPoint(x: screenFrame.midX, y: screenFrame.midY)
         let windowOrigin = CGPoint(
             x: screenCenter.x - layoutNameWindow.frame.width / 2.0,

Amethyst/Model/Screen.swift

@@ -40,6 +40,9 @@ protocol ScreenType: Equatable {
     /// The frame adjusted such that the dock and menu are not included.
     func frameWithoutDockOrMenu() -> CGRect
 
+    /// The frame without adjustment.
+    func frame() -> CGRect
+
     /// The opaque idenfitifer for the screen in the underlying graphics system.
     func screenID() -> String?
 
@@ -119,6 +122,10 @@ struct AMScreen: ScreenType {
         return screen.frameWithoutDockOrMenu()
     }
 
+    func frame() -> CGRect {
+        return screen.frame
+    }
+
     func screenID() -> String? {
         guard let managedDisplay = CGSCopyBestManagedDisplayForRect(CGSMainConnectionID(), frameIncludingDockAndMenu()) else {
             return nil

AmethystTests/Model/TestScreen.swift

@@ -42,6 +42,10 @@ final class TestScreen: ScreenType {
         return internalFrame
     }
 
+    func frame() -> CGRect {
+        return internalFrame
+    }
+
     func screenID() -> String? {
         return id
     }