Steps:
1. In the documentation the example we have given for Unreleasedversions/ releasedversions give feeling that project name is a required parameter. I will file a separate issue to rectify that.
2. Create a query like project=JIRA and fixVersion in releasedversions(JIRA) and try to click on "Simple"

Result:
1. User get an error "Query is too complex to display in the Issue Navigator edit controls."
2. Just delete the project name from the function and user can see the query in simple view.

Expected:
1. We should be supporting queries like these in simple view. As user can easily create query like above in simple view.
2. Giving error message about complex query is only going to confuse user.