Cocoa: Fix unresponsive cursor after cursor warp

This is a companion to 157ebb80aa and
fixes the same issue for calls to glfwSetCursorPos.

Related to #1962

(cherry picked from commit 6ed5294223)

README.md

@@ -126,6 +126,8 @@ information on what to include when reporting a bug.
  - [Win32] Bugfix: Compilation with LLVM for Windows failed (#1807,#1824,#1874)
  - [Cocoa] Bugfix: The MoltenVK layer contents scale was updated only after
    related events were emitted
+ - [Cocoa] Bugfix: Moving the cursor programmatically would freeze it for
+   a fraction of a second (#1962)
  - [X11] Bugfix: Changing `GLFW_FLOATING` could leak memory
  - [Wayland] Bugfix: Some keys were not repeating in Wayland (#1908)
  - [Wayland] Bugfix: Non-arrow cursors are offset from the hotspot (#1706,#1899)

src/cocoa_window.m

@@ -117,7 +117,8 @@ static void updateCursorMode(_GLFWwindow* window)
         _glfwPlatformSetCursorPos(window,
                                   _glfw.ns.restoreCursorPosX,
                                   _glfw.ns.restoreCursorPosY);
-        CGAssociateMouseAndMouseCursorPosition(true);
+        // NOTE: The matching CGAssociateMouseAndMouseCursorPosition call is
+        //       made in _glfwPlatformSetCursorPos as part of a workaround
     }
 
     if (cursorInContentArea(window))
@@ -1523,6 +1524,11 @@ void _glfwPlatformSetCursorPos(_GLFWwindow* window, double x, double y)
                                               _glfwTransformYNS(globalPoint.y)));
     }
 
+    // HACK: Calling this right after setting the cursor position prevents macOS
+    //       from freezing the cursor for a fraction of a second afterwards
+    if (window->cursorMode != GLFW_CURSOR_DISABLED)
+        CGAssociateMouseAndMouseCursorPosition(true);
+
     } // autoreleasepool
 }