Telegram floods badge count and causes prolonged vibrations

[Michał Karnicki]

We should limit the number of badge count updates to required minimum.

You'll have to have an insight into the app to see that it's fixed.
$ bzr branch lp:libqtelegram/app-dev
$ cd app-dev
# install an old click now
$ ./scripts/rm-cache.sh
$ ./scripts/applog.sh |grep "Updating badge"
# send a couple new messages to DUT
# run the app, you'll see tons of messages like "Updating badge 0"

Now, install the newest click.
$ ./scripts/rm-cache.sh
$ ./scripts/applog.sh |grep "Updating badge"
# send a couple new messages to DUT
$ run the app, you should only see "Updating badge" with unique counts, not repeated with same values