The SoftwareCenter Launcher Integration cancel
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Setup: 
#. Open software-center

Actions:  
#. Click on install on a big application like wesnoth
#. Verify that the icon "flies" into the launcher
#. Wait until the "In Progress" appears in the toplevel toolbar of s-c
#. Click on the "In Progress" button in the toolbar
#. Click on the "cancel" button of the install of the application

Expected Result:
  The icon is removed from the launcher again after the download was
  canceled.