Bug 890440 - Disable system workarounds for notification sent with the deprecated API

Notification which have been sent with the old API should not be treated
with the hacks and workarounds we implemented to circumvent its
limitations. So we detect whether a notification was sent from this
deprecated API based on the form of the id property.
Merge pull request #14719 from lissyx/bug890440

Bug 890440 - Disable system workarounds for notification sent with the deprecated API r=alive