Wrong type shown for property in QML

1. Open the keyinteraction example from a recent source tree of Qt.
   I tried 5.6.1 and 5.10.1. The example is in qtdeclarative\examples\quick\keyinteraction\keyinteraction.pro
2. Open focus.qml from the project.
3. Hover the mouse pointer over "focus" in line 54:

   focus: true
   

   A tooltip will show "Rectangle".

The tooltip should show "boolean" instead. When you move the mouse from the property's name to the value, the right tooltip will be shown.

Found when updating Squish-Test tst_qml_editor.