ManageIQ/manageiq — pull request #767 by martinpovolny (2014-10-03 11:11:42+00:00)
Title: Report editor: whitelist filter buttons.

Testing:
1. Go to report editor.
1. Create a report based on Virtual Machines.
1. Select a column from secondary table such as `Advanced Settings : Date Created`
1. Navigate to `Filter` accordion.
1. Try switching between expression editors using pencil icon.