Merge lp://qastaging/~marcobiscaro2112/unity/fixes-724045 into lp://qastaging/unity

The first problem was that BamfLauncherIcon::ActivateLauncherIcon was never receiving the scaleWasActive flag because the method that call it (LauncherIcon::Activate) was always terminating scale.

So, I turned LauncherIcon::Activate into virtual and overwrote it in BamfLauncherIcon.

The second problem was that method BamfLauncherIcon::ActivateLauncherIcon was not working as expected. I've rewrite the method following the desired behaviour in its comment. Below there is a pseudo-code of the method.

// Pseudo-code
When a BamfLauncherIcon is clicked:

If the application is not running
  Finish scale, if scale was active
  Launch it
If the application is running
  If the application is active
    If the scale was active
      Terminate scale
    If the scale was not active
      Spread application
  If the application is not active
    If the scale was active
      Change spread
    If the scale was not active
      Focus application
Send a UBUS_LAUNCHER_ACTION_DONE message
// End of pseudo-code