don't show 'change membership class' form if there's only one class
don't show 'change membership class' form if there's only one class

emmapersky/one-click-orgs,oneclickorgs/one-click-orgs-deployment,oneclickorgs/one-click-orgs,oneclickorgs/one-click-orgs-deployment,emmapersky/one-click-orgs,oneclickorgs/one-click-orgs,oneclickorgs/one-click-orgs-deployment,oneclickorgs/one-click-orgs,oneclickorgs/one-click-orgs