SDL: Make sure new windows have mouse and keyboard focus if there's no windowing system

SDL Commits
1 
From 5948ea997ff32c800e66c0ba722d8e2712404e68 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Mon, 8 Jan 2024 13:54:18 -0800
Subject: [PATCH] Make sure new windows have mouse and keyboard focus if
 there's no windowing system

---
 src/video/SDL_video.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/video/SDL_video.c b/src/video/SDL_video.c
index 8efd6f0dd748..3813b30dd6d4 100644
--- a/src/video/SDL_video.c
+++ b/src/video/SDL_video.c
@@ -2131,9 +2131,15 @@ SDL_Window *SDL_CreateWindowWithProperties(SDL_PropertiesID props)
         parent->first_child = window;
     }
 
-    if (_this->CreateSDLWindow && _this->CreateSDLWindow(_this, window, props) < 0) {
-        SDL_DestroyWindow(window);
-        return NULL;
+    if (_this->CreateSDLWindow) {
+        if (_this->CreateSDLWindow(_this, window, props) < 0) {
+            SDL_DestroyWindow(window);
+            return NULL;
+        }
+    } else {
+        /* No windowing system, make sure the new window has focus */
+        SDL_SetMouseFocus(window);
+        SDL_SetKeyboardFocus(window);
     }
 
     /* Clear minimized if not on windows, only windows handles it at create rather than FinishWindowCreation,