### 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
tools_button_group->connect("pressed", callable_mp(this, &TileSetAtlasSourceEditor::_update_tile_inspector).unbind(1));
	tools_button_group->connect("pressed", callable_mp(this, &TileSetAtlasSourceEditor::_update_tile_data_editors).unbind(1));
	tools_button_group->connect("pressed", callable_mp(this, &TileSetAtlasSourceEditor::_update_current_tile_data_editor).unbind(1));
	tools_button_group->connect("pressed", callable_mp(this, &TileSetAtlasSourceEditor::_update_atlas_view).unbind(1));
	tools_button_group->connect("pressed", callable_mp(this, &TileSetAtlasSourceEditor::_update_toolbar).unbind(1));
	HBoxContainer *toolbox = memnew(HBoxContainer);
	middle_vbox_container->add_child(toolbox);
	tool_setup_atlas_source_button = memnew(Button);
	tool_setup_atlas_source_button->set_text(TTR("Setup"));
	tool_setup_atlas_source_button->set_flat(true);
	tool_setup_atlas_source_button->set_toggle_mode(true);
	tool_setup_atlas_source_button->set_pressed(true);
	tool_setup_atlas_source_button->set_button_group(tools_button_group);
	tool_setup_atlas_source_button->set_tooltip_text(TTR("Atlas setup. Add/Remove tiles tool (use the shift key to create big tiles, control for rectangle editing)."));
	toolbox->add_child(tool_setup_atlas_source_button);
	tool_select_button = memnew(Button);
	tool_select_button->set_text(TTR("Select"));
	tool_select_button->set_flat(true);
	tool_select_button->set_toggle_mode(true);
	tool_select_button->set_pressed(false);
	tool_select_button->set_button_group(tools_button_group);
	tool_select_button->set_tooltip_text(TTR("Select tiles."));
	toolbox->add_child(tool_select_button);
	tool_paint_button = memnew(Button);
	tool_paint_button->set_text(TTR("Paint"));
	tool_paint_button->set_flat(true);
	tool_paint_button->set_toggle_mode(true);
	tool_paint_button->set_button_group(tools_button_group);
	tool_paint_button->set_tooltip_text(TTR("Paint properties."));
	toolbox->add_child(tool_paint_button);