quick start lite ui subject lookup is not case insensitive

> Simple things like browsing though the groups and trying to add a
> member where confusing at first: I saw that there was an "Ian Windsor"
> in some group, so I tried to add this user to another group (Admin UI).
> But searching for "Ian" or typing "Ia" in the LiteUI (for
> auto-completion) didn't bring up any results – only when written in
> lower-case ("ian", "ia") results where found. Even though the results
> themselfs were presented in initcaps ("Peter Bush", "Ian ...").