Merge pull request #46845 from Faless/js/4.x_init_canvas_size

[HTML5] Properly set canvas size during setup.

platform/javascript/js/libs/library_godot_display.js

@@ -805,6 +805,7 @@ const GodotDisplay = {
 			canvas.style.left = 0;
 			break;
 		}
+		GodotDisplayScreen.updateSize();
 		if (p_fullscreen) {
 			GodotDisplayScreen.requestFullscreen();
 		}