Generalise window resize event

Author: MutatingFunc

Amethyst/Layout/Layouts/BinarySpacePartitioningLayout.swift

@@ -245,7 +245,7 @@ class BinarySpacePartitioningLayout<Window: WindowType>: StatefulLayout<Window>
 
             windowNode.windowID = otherWindowID
             otherWindowNode.windowID = windowID
-        case .applicationDeactivate, .applicationActivate, .spaceChange, .layoutChange, .tabChange, .none, .unknown:
+        case .resize, .applicationDeactivate, .applicationActivate, .spaceChange, .layoutChange, .tabChange, .none, .unknown:
             break
         }
     }

Amethyst/Layout/Layouts/CustomLayout.swift

@@ -302,6 +302,9 @@ class CustomLayout<Window: WindowType>: StatefulLayout<Window>, PanedLayout {
         case .remove(window: let window):
             jsChange["change"] = "remove"
             jsChange["windowID"] = idHash(forWindowID: window.id())
+        case .resize(window: let window):
+            jsChange["change"] = "resize"
+            jsChange["windowID"] = idHash(forWindowID: window.id())
         case .focusChanged(window: let window):
             jsChange["change"] = "focus_changed"
             jsChange["windowID"] = idHash(forWindowID: window.id())

Amethyst/Managers/ScreenManager.swift

@@ -168,7 +168,7 @@ final class ScreenManager<Delegate: ScreenManagerDelegate>: NSObject, Codable {
             if lastFocusedWindow == window {
                 lastFocusedWindow = nil
             }
-        case .windowSwap, .applicationActivate, .applicationDeactivate, .spaceChange, .layoutChange, .tabChange, .none, .unknown:
+        case .resize, .windowSwap, .applicationActivate, .applicationDeactivate, .spaceChange, .layoutChange, .tabChange, .none, .unknown:
             break
         }
 

Amethyst/Managers/WindowManager.swift

@@ -611,7 +611,7 @@ extension WindowManager: ApplicationObservationDelegate {
         case let .doneDragging(lmbUpMoment):
 
             if let screenManager = focusedScreenManager(), screenManager.currentLayout is FloatingGridLayout {
-                screenManager.setNeedsReflow(withWindowChange: .layoutChange)
+                screenManager.setNeedsReflow(withWindowChange: .resize(window: window))
             }
 
             mouseStateKeeper.state = .pointing // flip state first to prevent race condition
@@ -644,7 +644,7 @@ extension WindowManager: ApplicationObservationDelegate {
 
         guard layout is PanedLayout else {
             if layout is FloatingGridLayout, case .doneDragging = mouseStateKeeper.state {
-                screenManager.setNeedsReflow(withWindowChange: .layoutChange)
+                screenManager.setNeedsReflow(withWindowChange: .resize(window: window))
             }
             return
         }

Amethyst/Model/Change.swift

@@ -11,6 +11,7 @@ import Foundation
 enum Change<Window: WindowType> {
     case add(window: Window)
     case remove(window: Window)
+    case resize(window: Window)
     case focusChanged(window: Window)
     case windowSwap(window: Window, otherWindow: Window)
     case applicationActivate