Software Center doesn’t notify of its startup when installing new applications from the dash

[Olivier Tilloy]

Steps to reproduce:
 - open the applications place entry
 - search for "software"
 - click on the icon for Software Center
 - notice that the icon for S-C in the launcher starts glowing to notify that it is launching
 - exit S-C
 - open the applications place entry again
 - slide all the way down to the group of "available" applications (not installed)
 - click on any of them to start installing it in S-C

Expected result: the icon for S-C in the launcher starts glowing to notify that it is launching

Current result: S-C is launching but its icon doesn’t glow

[Olivier Tilloy (osomon)]

Note: this may be an issue in unity-2d or in S-C itself. Determining this will require more investigation.