Fix memory leak when GUI window is closed (#198)

* Fix memory leak for Win & Mac

* Remove retain call instead on Mac

* Comment out PostMessage

* Reverse Windows changes

---------

Co-authored-by: Micah Johnston <[email protected]>

Author: dathinaios

src/gl/macos.rs

@@ -95,7 +95,6 @@ impl GlContext {
 
         view.setWantsBestResolutionOpenGLSurface_(YES);
 
-        let () = msg_send![view, retain];
         NSOpenGLView::display_(view);
         parent_view.addSubview_(view);
 

src/macos/window.rs

@@ -72,7 +72,6 @@ impl WindowInner {
     pub(super) fn close(&self) {
         if self.open.get() {
             self.open.set(false);
-
             unsafe {
                 // Take back ownership of the NSView's Rc<WindowState>
                 let state_ptr: *const c_void = *(*self.ns_view).get_ivar(BASEVIEW_STATE_IVAR);