Creator does not find qmlviewer in added Kit

1. Open a QML project.
   I used samegame1 tutorial.
   The run button will be green and the project can be run.
2. In Projects mode, add and select a different Kit for the project.
   The Run button will turn gray. Its tooltip reads "No qmlviewer or qmlscene found."
3. Remove the initial Kit from the project.
   The run button still is gray.
4. Close and reopen the same project.
   Now the Run button will be green and the project can be run although it uses the Kit added in step 2.

Instead, Creator should find the qmlviewer immediately.