Description of problem:
After starting pup, the Icon in the upper left corner is missing (left of
"Package Updater")

Version-Release number of selected component (if applicable):
pirut-1.3.28-2

How reproducible:
always

Steps to Reproduce:
1. Click on Applications -> System Tools -> Software Updater
  
Actual results:
no icon

Expected results:
see icon

Additional info:
Glade widget "pupImage" uses a named icon called "system-software-update", which
is not defined.