### 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
hovered_alternative_tile_coords = Vector3i(TileSetSource::INVALID_ATLAS_COORDS.x, TileSetSource::INVALID_ATLAS_COORDS.y, TileSetSource::INVALID_TILE_ALTERNATIVE);
	tile_atlas_control->queue_redraw();
	tile_atlas_control_unscaled->queue_redraw();
	alternative_tiles_control->queue_redraw();
	alternative_tiles_control_unscaled->queue_redraw();
}
void TileSetAtlasSourceEditor::_tile_alternatives_control_draw() {
	
	if (tools_button_group->get_pressed_button() == tool_select_button) {
		
		Vector2i coords = Vector2(hovered_alternative_tile_coords.x, hovered_alternative_tile_coords.y);
		if (coords != TileSetSource::INVALID_ATLAS_COORDS) {
			Rect2i rect = tile_atlas_view->get_alternative_tile_rect(coords, hovered_alternative_tile_coords.z);
			if (rect != Rect2i()) {
				TilesEditorUtils::draw_selection_rect(alternative_tiles_control, rect, Color(1.0, 0.8, 0.0, 0.5));
			}
		}
		
		for (const TileSelection &E : selection) {
			TileSelection selected = E;
			if (selected.alternative >= 1) {
				Rect2i rect = tile_atlas_view->get_alternative_tile_rect(selected.tile, selected.alternative);
				if (rect != Rect2i()) {
					TilesEditorUtils::draw_selection_rect(alternative_tiles_control, rect);
				}
			}
		}
	}
}
void TileSetAtlasSourceEditor::_tile_alternatives_control_unscaled_draw() {