Console sends undefined instead of false for unchecked toggle switches

[georgesnelling]

For workflows which take boolean values, the Console renders a toggle switch. When the toggle remains switched to "off", the resulting computed value is undefined instead of false. This translated to passing no value for the input when making the launch request.
For required inputs with no default value, that will result in a 400.

At the very least, if a boolean value is required and has no default, we should be translating an unchecked toggle to false to make sure the launch request succeeds.

Once default values are implemented for the form, this should become less of an issue.