### 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
Array output;
	for (const TileSelection &E : selection) {
		output.push_back(E.tile);
		output.push_back(E.alternative);
	}
	return output;
}
void TileSetAtlasSourceEditor::_tile_atlas_control_draw() {
	
	if (tools_button_group->get_pressed_button() == tool_select_button) {
		for (const TileSelection &E : selection) {
			TileSelection selected = E;
			if (selected.alternative == 0) {
				
				for (int frame = 0; frame < tile_set_atlas_source->get_tile_animation_frames_count(selected.tile); frame++) {
					Color color = Color(0.0, 1.0, 0.0, frame == 0 ? 1.0 : 0.3);
					Rect2 region = tile_set_atlas_source->get_tile_texture_region(selected.tile, frame);
					TilesEditorUtils::draw_selection_rect(tile_atlas_control, region, color);