Comment 4 for bug 921312

I wrote that existing secondary text. However, I have since redesigned Update Manager more thoroughly, and the redesign does not have a paragraph of secondary text at all. <https://wiki.ubuntu.com/SoftwareUpdates#alert> I judged it was worth losing the instructions for how to launch Update Manager manually, in exchange for increasing the proportion of people who would read the alert at all.

The other element in the current secondary text, as quoted above, is the sentence "These software updates have been issued since Ubuntu was released". This catered for the case where you're surprised about updates being available because you've only just installed the OS or bought the PC. So, I propose that that sentence should replace the usual first sentence in the primary text. <https://wiki.ubuntu.com/SoftwareUpdates?action=diff&rev2=60&rev1=59>