This commit avoids to fire the google-signed-out event when the element
initializes its property "signedIn". When the element is created, its
property "signedIn" changes from "undefined" to "false". At this time,
it shouldn't send event. It's the reason why I added the condition on
the previous value.
This commit avoids to fire the google-signed-out event when the element initializes its property "signedIn". When the element is created, its property "signedIn" changes from "undefined" to "false". At this time, it shouldn't send event. It's the reason why I added the condition on the previous value.
fixes #139