If you can push something you could say it is pushable. What do you say about something which you can enable and about something which you can disable?
To alternate between two or more electronic, mechanical, or computer-related options, usually by the operation of a single switch or keystroke: toggled back and forth between two windows on the screen.
1. Able to be toggled.
That button is togglable.
(And no, I did not add that to Wiktionary just now.)
A toggle is generally recognized as being a binary condition, one or the other. I think it is a nice fit for capable of being enabled and disabled.
You could also use switchable, but it does not have as strong of a connotation for binary states and would cause more confusion.