### Godot version

v4.2.dev3.official [013e8e3af]

### System information

Windows 11, Core i5-12400F, RX 6600

### Issue description

TileSet->Setup->Separation maybe should have "px" like rest?
![Screenshot 2023-08-21 162202](https://github.com/godotengine/godot/assets/962340/3c6b9a97-7520-4610-8153-7882cc9c303f)
I know this is pixels from testing it.

TileSet->Select is this Animation Separation "px" too? idk
![Screenshot 2023-08-21 162131](https://github.com/godotengine/godot/assets/962340/fcb580e3-9ff7-41d8-92d3-e585841d3803)
I tried setting up animation separation and got a not enough room error, so maybe not "px". idk


Thanks.


### Steps to reproduce

- open TileSet->Setup->Separation, note some have "px" and one doesn't
- open TileSet->Select, is this separation "px" too?


### Minimal reproduction project

n/a
bool all_alternatve_id_zero = true;
	for (TileSelection tile : tiles) {
		if (tile.alternative != 0) {
			all_alternatve_id_zero = false;
			break;
		}
	}
	if (all_alternatve_id_zero) {
		p_list->push_back(PropertyInfo(Variant::NIL, GNAME("Animation", "animation_"), PROPERTY_HINT_NONE, "animation_", PROPERTY_USAGE_GROUP));
		p_list->push_back(PropertyInfo(Variant::INT, PNAME("animation_columns")));
		p_list->push_back(PropertyInfo(Variant::VECTOR2I, PNAME("animation_separation")));
		p_list->push_back(PropertyInfo(Variant::FLOAT, PNAME("animation_speed")));
		p_list->push_back(PropertyInfo(Variant::INT, PNAME("animation_mode"), PROPERTY_HINT_ENUM, "Default,Random Start Times"));
		p_list->push_back(PropertyInfo(Variant::INT, PNAME("animation_frames_count"), PROPERTY_HINT_NONE, "", PROPERTY_USAGE_EDITOR | PROPERTY_USAGE_ARRAY, "Frames,animation_frame_"));
		
		if (tile_set_atlas_source->get_tile_animation_frames_count(tiles.front()->get().tile) == 1) {
			p_list->push_back(PropertyInfo(Variant::FLOAT, "animation_frame_0/duration", PROPERTY_HINT_NONE, "suffix:s", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_READ_ONLY));
		} else {
			for (int i = 0; i < tile_set_atlas_source->get_tile_animation_frames_count(tiles.front()->get().tile); i++) {
				p_list->push_back(PropertyInfo(Variant::FLOAT, vformat("animation_frame_%d/%s", i, PNAME("duration")), PROPERTY_HINT_NONE, "suffix:s"));
			}
		}
	}
	
	struct PropertyId {
		int occurence_id = 0;
		String property;
		bool operator<(const PropertyId &p_other) const {