[sugar] notify::active signal behaviour change

[Daniel Drake]

Hi,

In update1, when you launch an activity by clicking an icon, the
activity receives a notify::active signal immediately after it has
launched. Measure relies on this assumption.

In 8.2, when launching an activity by clicking on the icon, no
notify::active signal arrives on launch. However, if you launch from
terminal with the sugar-launch command, the signal is indeed generated.

Bug or feature?

Thanks,
Daniel