### 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
return true;
		} else if (p_name == "animation_speed") {
			for (TileSelection tile : tiles) {
				tile_set_atlas_source->set_tile_animation_speed(tile.tile, p_value);
			}
			emit_signal(SNAME("changed"), "animation_speed");
			return true;
		} else if (p_name == "animation_mode") {
			for (TileSelection tile : tiles) {
				tile_set_atlas_source->set_tile_animation_mode(tile.tile, VariantCaster<TileSetAtlasSource::TileAnimationMode>::cast(p_value));
			}
			emit_signal(SNAME("changed"), "animation_mode");
			return true;
		} else if (p_name == "animation_frames_count") {
			for (TileSelection tile : tiles) {
				int frame_count = p_value;
				if (frame_count == 0) {
					frame_count = 1;
				}
				bool has_room_for_tile = tile_set_atlas_source->has_room_for_tile(tile.tile, tile_set_atlas_source->get_tile_size_in_atlas(tile.tile), tile_set_atlas_source->get_tile_animation_columns(tile.tile), tile_set_atlas_source->get_tile_animation_separation(tile.tile), frame_count, tile.tile);
				if (!has_room_for_tile) {
					ERR_PRINT(vformat("Cannot add frames to the animation, not enough room in the atlas to layout %s frames.", frame_count));
				} else {
					tile_set_atlas_source->set_tile_animation_frames_count(tile.tile, frame_count);
				}
			}
			notify_property_list_changed();
			emit_signal(SNAME("changed"), "animation_separation");
			return true;
		} else if (components.size() == 2 && components[0].begins_with("animation_frame_") && components[0].trim_prefix("animation_frame_").is_valid_int()) {