Cocoa: Disable macOS fullscreen when non-resizable

Windows with GLFW_RESIZABLE set to false should not be resizable by the
user.

README.md

@@ -227,6 +227,7 @@ information on what to include when reporting a bug.
  - [Cocoa] Changed `EGLNativeWindowType` from `NSView` to `CALayer` (#1169)
  - [Cocoa] Changed F13 key to report Print Screen for cross-platform consistency
    (#1786)
+ - [Cocoa] Disabled macOS fullscreen when `GLFW_RESIZABLE` is false
  - [Cocoa] Removed dependency on the CoreVideo framework
  - [Cocoa] Bugfix: `glfwSetWindowSize` used a bottom-left anchor point (#1553)
  - [Cocoa] Bugfix: Window remained on screen after destruction until event poll

src/cocoa_window.m

@@ -837,6 +837,12 @@ static GLFWbool createNativeWindow(_GLFWwindow* window,
                 NSWindowCollectionBehaviorManaged;
             [window->ns.object setCollectionBehavior:behavior];
         }
+        else
+        {
+            const NSWindowCollectionBehavior behavior =
+                NSWindowCollectionBehaviorFullScreenNone;
+            [window->ns.object setCollectionBehavior:behavior];
+        }
 
         if (wndconfig->floating)
             [window->ns.object setLevel:NSFloatingWindowLevel];
@@ -1300,6 +1306,20 @@ void _glfwSetWindowMonitorCocoa(_GLFWwindow* window,
         else
             [window->ns.object setLevel:NSNormalWindowLevel];
 
+        if (window->resizable)
+        {
+            const NSWindowCollectionBehavior behavior =
+                NSWindowCollectionBehaviorFullScreenPrimary |
+                NSWindowCollectionBehaviorManaged;
+            [window->ns.object setCollectionBehavior:behavior];
+        }
+        else
+        {
+            const NSWindowCollectionBehavior behavior =
+                NSWindowCollectionBehaviorFullScreenNone;
+            [window->ns.object setCollectionBehavior:behavior];
+        }
+
         [window->ns.object setHasShadow:YES];
         // HACK: Clearing NSWindowStyleMaskTitled resets and disables the window
         //       title property but the miniwindow title property is unaffected
@@ -1365,7 +1385,23 @@ GLFWbool _glfwFramebufferTransparentCocoa(_GLFWwindow* window)
 void _glfwSetWindowResizableCocoa(_GLFWwindow* window, GLFWbool enabled)
 {
     @autoreleasepool {
+
     [window->ns.object setStyleMask:getStyleMask(window)];
+
+    if (enabled)
+    {
+        const NSWindowCollectionBehavior behavior =
+            NSWindowCollectionBehaviorFullScreenPrimary |
+            NSWindowCollectionBehaviorManaged;
+        [window->ns.object setCollectionBehavior:behavior];
+    }
+    else
+    {
+        const NSWindowCollectionBehavior behavior =
+            NSWindowCollectionBehaviorFullScreenNone;
+        [window->ns.object setCollectionBehavior:behavior];
+    }
+
     } // autoreleasepool
 }