### Godot version

4.1 dev2, 4.0.3

### System information

Windows 10, ryzen 5900x, radeon 6950xt (driver: 23.2.2)

### Issue description

There are two bugs:
- When I create a new node, it is created outside of the viewport. (as in first video)
- When I run the project, all the content inside the viewport dont appear. (as in second video)
I believe the second issue is related to the first.

Note: these problems are in RTL editors.

https://github.com/godotengine/godot/assets/121864036/84f0d434-0d1b-4c23-9fb0-510257e2e191


https://github.com/godotengine/godot/assets/121864036/b2bc20c7-1e2e-4d04-99e7-d66860ffced2




### Steps to reproduce

Videos explain.

### Minimal reproduction project

N/A
_notify_theme_override_changed();
		} else {
			return false;
		}
	} else {
		if (name.begins_with("theme_override_icons/")) {
			String dname = name.get_slicec('/', 1);
			add_theme_icon_override(dname, p_value);
		} else if (name.begins_with("theme_override_styles/")) {
			String dname = name.get_slicec('/', 1);
			add_theme_style_override(dname, p_value);
		} else if (name.begins_with("theme_override_fonts/")) {
			String dname = name.get_slicec('/', 1);
			add_theme_font_override(dname, p_value);
		} else if (name.begins_with("theme_override_font_sizes/")) {
			String dname = name.get_slicec('/', 1);
			add_theme_font_size_override(dname, p_value);
		} else if (name.begins_with("theme_override_colors/")) {
			String dname = name.get_slicec('/', 1);
			add_theme_color_override(dname, p_value);
		} else if (name.begins_with("theme_override_constants/")) {
			String dname = name.get_slicec('/', 1);
			add_theme_constant_override(dname, p_value);
		} else {
			return false;
		}
	}
	return true;
}
bool Control::_get(const StringName &p_name, Variant &r_ret) const {