Comment 2 for bug 1690964

Thanks, but that does sound strange...
  Personal: 2 rows
  Hardware: 2 rows
  System: Limited to 1 row?

Ah yes, I can see there are at least three ways to launch Software & Updates still:
  1. Launch Gnome 'Software' and then find it in the panel menu.
  2. Search apps for 'Software & Updates'
  3. Just execute $ software-properties-gtk

For me this is no big deal but it's a significant omission for regular Ubuntu users moving from Unity7 to Gnome Shell.