Linux: Make sure a newly created window get the focus, if possible, to avoid a fullscreen window immediately getting minimized

src/native/linux/org_lwjgl_opengl_Display.c

@@ -298,6 +298,7 @@ static Window createWindow(JNIEnv* env, Display *disp, int screen, jint window_m
 	XMapRaised(disp, win);
 	waitMapped(disp, win);
 	XClearWindow(disp, win);
+	XSetInputFocus(disp, win, RevertToNone, CurrentTime);
 	if (!checkXError(env, disp)) {
 		destroyWindow(env, disp, win);
 		return 0;