Operating system : Windows 10
graphics card : Radeon(TM) RX 460 Graphics
Broken: 2.79 build 2018-03-20
in blender ver. 2.79a works properly.
Short description of error
In the 'video sequence editor'. When you click on the menu bar, option add, another menu with options appears, one of them is scene, it allows you to choose between the different scenes of the project because if exist only one scene, not show options, if there are several scenes show all but the current scene.