ui: fix BIG ui with scale (#37690)

* Update application.py

* Apply suggestions from code review

---------

Co-authored-by: Shane Smiskol <shane@smiskol.com>

system/ui/lib/application.py

@@ -452,6 +452,11 @@ class GuiApplication:
 
   def texture(self, asset_path: str, width: int | None = None, height: int | None = None,
               alpha_premultiply=False, keep_aspect_ratio=True, flip_x: bool = False) -> rl.Texture:
+    if width is not None:
+      width = round(width)
+    if height is not None:
+      height = round(height)
+
     cache_key = f"{asset_path}_{width}_{height}_{alpha_premultiply}_{keep_aspect_ratio}_{flip_x}"
     if cache_key in self._textures:
       return self._textures[cache_key]