As discussed in #4848, this disables fuzzy matching when the string
given has a period in it. So for example "flatpak install org.mozilla"
would not offer "org.mozilla.firefox" even though the string given is a
substring of the app ID. This is desirable because it helps ensure fuzzy
matching is only used when the user intended to use it.
As with the previous commit that fixed#4829, this does technically
break backwards compatibility, but only in an interface intended for
interactive use by a human, not an interface that's used
programmatically, so it seems okay.
5acb4ee7e4