### 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
if (tools_button_group->get_pressed_button() == tool_setup_atlas_source_button) {
						if (tools_settings_erase_button->is_pressed()) {
							
							if (mb->is_ctrl_pressed() || mb->is_shift_pressed()) {
								
								
								drag_type = DRAG_TYPE_REMOVE_TILES_USING_RECT;
								drag_start_mouse_pos = mouse_local_pos;
								drag_last_mouse_pos = drag_start_mouse_pos;
							} else {
								
								
								drag_type = DRAG_TYPE_REMOVE_TILES;
								drag_start_mouse_pos = mouse_local_pos;
								drag_last_mouse_pos = drag_start_mouse_pos;
								
								Vector2i coords = tile_atlas_view->get_atlas_tile_coords_at_pos(drag_start_mouse_pos);
								if (coords != TileSetSource::INVALID_ATLAS_COORDS) {
									coords = tile_set_atlas_source->get_tile_at_coords(coords);
								}
								if (coords != TileSetSource::INVALID_ATLAS_COORDS) {
									drag_modified_tiles.insert(coords);
								}
							}
						} else {
							
							if (mb->is_shift_pressed()) {
								
								Vector2i coords = tile_atlas_view->get_atlas_tile_coords_at_pos(mouse_local_pos);
								if (coords != TileSetSource::INVALID_ATLAS_COORDS && tile_set_atlas_source->get_tile_at_coords(coords) == TileSetSource::INVALID_ATLAS_COORDS) {