[Bug 37144] Single item completion dropdowns become invisible.

[Scott Robinson]

Public bug reported:
https://launchpad.net/malone/bugs/37144

Affects: ubuntulooks (Ubuntu)
       Severity: Normal
       Priority: (none set)
         Status: Unconfirmed

Description:
If a text-input with drop-down text completion is being used, and only a
single element can be completed, then when that item is hilited in the
dropdown it disappears.

It should normally hilite with the orange background.

The best way to test this, I have found, is open up Mozilla and find
some form I've entered multiple entries in. Then, type enough of a
particular entry that a single match is found. Press down-arrow and the
completion entry disappears instead of being hilited.