display(macOS): fix saving dynamic resolution

We saved the guest resolution but we restored it as a host view size so this
led to an incorrect second re-scaling causing incorrect resolution to be
restored.

Fixes #6854
Fixes #6864

Platform/macOS/Display/VMDisplayQemuMetalWindowController.swift

@@ -419,15 +419,13 @@ extension VMDisplayQemuMetalWindowController {
         if isFullScreenAutoCapture {
             captureMouse()
         }
-        saveDynamicResolution()
     }
 
     func windowDidExitFullScreen(_ notification: Notification) {
         isFullScreen = false
         if isFullScreenAutoCapture {
             releaseMouse()
         }
-        saveDynamicResolution()
     }
 
     func windowDidBecomeMain(_ notification: Notification) {
@@ -476,8 +474,8 @@ extension VMDisplayQemuMetalWindowController {
         }
         if resolution.isFullscreen && !isFullScreen {
             window.toggleFullScreen(self)
-        } else if resolution.size != .zero {
-            _ = self.updateGuestResolution(for: window, frameSize: resolution.size)
+        } else if let vmDisplay = vmDisplay, resolution.size != .zero {
+            vmDisplay.requestResolution(CGRect(origin: .zero, size: resolution.size))
         } else {
             _ = self.updateGuestResolution(for: window, frameSize: window.frame.size)
         }