Show time in 24 hour format (or at least add an option to allow this)

[tigran123]

The subject says it all: the time of last update should be optionally shown in 24 hour format, not with those weird "pm" and "am" things.

Actually, what would be nice is if you could detect if the user selected 24 hour format for the time display in the GNOME or Unity settings and use that. But if that is too hard, then please just add an option in Preferences to switch between the standard 24 hours and the strange non-military am/pm formats.

[cipman]

+1 for 24h format.