Use this class to manipulate editor tools in the Scene View.
| activeToolType | The type of EditorTool that is currently active. |
| IsActiveTool | Test if an EditorTool is currently the active tool. |
| RestorePreviousPersistentTool | Sets the last-used global EditorTool as the active tool. |
| RestorePreviousTool | Sets the last-used EditorTool as the active tool. |
| SetActiveTool | Sets the active EditorTool. |
| activeToolChanged | Add an event handler to be notified when the active tool has been changed. |
| activeToolChanging | Add an event handler to be notified when the active tool will be changed. |