### 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
tile_data_editor_dropdown_button->connect("draw", callable_mp(this, &TileSetAtlasSourceEditor::_tile_data_editor_dropdown_button_draw));
	tile_data_editor_dropdown_button->connect("pressed", callable_mp(this, &TileSetAtlasSourceEditor::_tile_data_editor_dropdown_button_pressed));
	tile_data_editors_vbox->add_child(tile_data_editor_dropdown_button);
	tile_data_editor_dropdown_button->add_child(tile_data_editors_popup);
	tile_data_editors_tree = memnew(Tree);
	tile_data_editors_tree->set_hide_root(true);
	tile_data_editors_tree->set_anchors_and_offsets_preset(Control::PRESET_FULL_RECT);
	tile_data_editors_tree->set_h_scroll_enabled(false);
	tile_data_editors_tree->set_v_scroll_enabled(false);
	tile_data_editors_tree->connect("item_selected", callable_mp(this, &TileSetAtlasSourceEditor::_tile_data_editors_tree_selected));
	tile_data_editors_popup->add_child(tile_data_editors_tree);
	tile_data_painting_editor_container = memnew(VBoxContainer);
	tile_data_painting_editor_container->set_h_size_flags(SIZE_EXPAND_FILL);
	tile_data_editors_vbox->add_child(tile_data_painting_editor_container);
	
	atlas_source_proxy_object = memnew(TileSetAtlasSourceProxyObject());
	atlas_source_proxy_object->connect("changed", callable_mp(this, &TileSetAtlasSourceEditor::_atlas_source_proxy_object_changed));
	atlas_source_inspector = memnew(EditorInspector);
	atlas_source_inspector->set_v_size_flags(SIZE_EXPAND_FILL);
	atlas_source_inspector->set_show_categories(true);
	atlas_source_inspector->add_inspector_plugin(memnew(TileSourceInspectorPlugin));
	atlas_source_inspector->edit(atlas_source_proxy_object);
	middle_vbox_container->add_child(atlas_source_inspector);
	
	VBoxContainer *right_vbox_container = memnew(VBoxContainer);
	add_child(right_vbox_container);
	
	tool_settings = memnew(HBoxContainer);
	right_vbox_container->add_child(tool_settings);
	tool_settings_tile_data_toolbar_container = memnew(HBoxContainer);