### 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
ERR_MAIN_THREAD_GUARD_V(false);
	String sname = p_name;
	if (!sname.begins_with("theme_override")) {
		return false;
	}
	if (sname.begins_with("theme_override_icons/")) {
		String name = sname.get_slicec('/', 1);
		r_ret = data.theme_icon_override.has(name) ? Variant(data.theme_icon_override[name]) : Variant();
	} else if (sname.begins_with("theme_override_styles/")) {
		String name = sname.get_slicec('/', 1);
		r_ret = data.theme_style_override.has(name) ? Variant(data.theme_style_override[name]) : Variant();
	} else if (sname.begins_with("theme_override_fonts/")) {
		String name = sname.get_slicec('/', 1);
		r_ret = data.theme_font_override.has(name) ? Variant(data.theme_font_override[name]) : Variant();
	} else if (sname.begins_with("theme_override_font_sizes/")) {
		String name = sname.get_slicec('/', 1);
		r_ret = data.theme_font_size_override.has(name) ? Variant(data.theme_font_size_override[name]) : Variant();
	} else if (sname.begins_with("theme_override_colors/")) {
		String name = sname.get_slicec('/', 1);
		r_ret = data.theme_color_override.has(name) ? Variant(data.theme_color_override[name]) : Variant();
	} else if (sname.begins_with("theme_override_constants/")) {
		String name = sname.get_slicec('/', 1);
		r_ret = data.theme_constant_override.has(name) ? Variant(data.theme_constant_override[name]) : Variant();
	} else {
		return false;
	}
	return true;
}
void Control::_get_property_list(List<PropertyInfo> *p_list) const {