The Updater component doesn't make much sense on dev versions. If you
want to run a production config with the updater enabled, you end up
with an 'Update Available' badge pointing you to the last release
version. This change disables the Updater component on dev and updates
the tests to use a faked version number.
A warning is emitted if the Updater component is disabled to ensure
there is no confusion.
Josh Wright
Fabian Affolter
Paulus Schoutsen