### 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
tool_settings->add_child(tool_settings_tile_data_toolbar_container);
	tools_settings_erase_button = memnew(Button);
	tools_settings_erase_button->set_flat(true);
	tools_settings_erase_button->set_toggle_mode(true);
	tools_settings_erase_button->set_shortcut(ED_SHORTCUT("tiles_editor/eraser", TTR("Eraser"), Key::E));
	tools_settings_erase_button->set_shortcut_context(this);
	tool_settings->add_child(tools_settings_erase_button);
	tool_advanced_menu_button = memnew(MenuButton);
	tool_advanced_menu_button->set_flat(true);
	tool_advanced_menu_button->get_popup()->add_item(TTR("Create Tiles in Non-Transparent Texture Regions"), ADVANCED_AUTO_CREATE_TILES);
	tool_advanced_menu_button->get_popup()->add_item(TTR("Remove Tiles in Fully Transparent Texture Regions"), ADVANCED_AUTO_REMOVE_TILES);
	tool_advanced_menu_button->get_popup()->connect("id_pressed", callable_mp(this, &TileSetAtlasSourceEditor::_menu_option));
	tool_settings->add_child(tool_advanced_menu_button);
	_update_toolbar();
	
	Control *middle_space = memnew(Control);
	middle_space->set_h_size_flags(SIZE_EXPAND_FILL);
	tool_settings->add_child(middle_space);
	tool_tile_id_label = memnew(Label);
	tool_tile_id_label->set_mouse_filter(Control::MOUSE_FILTER_STOP);
	tool_settings->add_child(tool_tile_id_label);
	_update_tile_id_label();
	
	VBoxContainer *right_panel = memnew(VBoxContainer);
	right_panel->set_h_size_flags(SIZE_EXPAND_FILL);
	right_panel->set_v_size_flags(SIZE_EXPAND_FILL);
	right_vbox_container->add_child(right_panel);
	
	tile_atlas_view = memnew(TileAtlasView);
	tile_atlas_view->set_h_size_flags(SIZE_EXPAND_FILL);