A control that is both a toggle and a dropdown used with EditorToolbarElementAttribute.
| dropdownClickable | Clickable object for this dropdown. |
| icon | The text associated with the element. |
| text | The icon associated with the element. |
| EditorToolbarDropdownToggle | コンストラクター |
| SetValueWithoutNotify | Allow to set a value without being notified of the change, if any. |
| dropdownClicked | Action triggered when the dropdown is clicked. |