Cannot reset value of "passwordCharacter"

1. Open a QML file using QtQuick.Controls 1.1 in Design mode.
2. Drag a TextInput Item onto the canvas.
3. In Properties editor, replace the content of "Pass. char" with some other character.
4. Click into a different control of the Properties editor.
   The value is accepted and turn blue.
5. Try resetting the value of "Pass. char" using the small drop down menu.
   It won't work.
6. Switch Creator to Edit mode and back to Design mode.
7. Try resetting the value of "Pass. char" using the small drop down menu.
   Now it works.

Resetting values in the Properties editor should always be possible.