Avoid an extra buffer swap during startup

glfw should not be swapping buffers behind the clients back. Since we
control the client, we can ensure that the OpenGL VRAM is cleared before
the window is shown.

Also fixes the issue with the glfw wayland backend where the buffer was
being created before the surface was configured

glfw/wl_window.c

@@ -496,6 +496,9 @@ static void xdgSurfaceHandleConfigure(void* data,
         int height = window->wl.pending.height;
         if (!window->wl.surface_configured_once) {
             window->wl.surface_configured_once = true;
+            // this will attach the buffer to the surface, the client is responsible for clearing the buffer to an appropriate blank
+            window->context.swapBuffers(window);
+
             if (!width && !height && !new_states && !window->wl.decorations.serverSide && getenv("XAUTHORITY") && strstr(getenv("XAUTHORITY"), "mutter")) {
                 // https://github.com/kovidgoyal/kitty/issues/4802
                 debug("Ignoring first empty surface configure event on mutter.\n");
@@ -1062,6 +1065,7 @@ void _glfwPlatformHideWindow(_GLFWwindow* window)
         xdg_surface_destroy(window->wl.xdg.surface);
         window->wl.xdg.toplevel = NULL;
         window->wl.xdg.surface = NULL;
+        window->wl.surface_configured_once = false;
     }
     window->wl.visible = false;
 }