Gets a list of current (non-archived) global space keys and names, not including any of the user's
favourite spaces. If the name of the space is longer than MAX_SPACE_NAME_LENGTH, it will be
shortened for display.
user - the user for which to generate the list, or null for the anonymous user
A list of pairs of the space key, and shortened space name.
public List<com.atlassian.core.util.PairType> getAggregateOptions(com.opensymphony.xwork.ActionSupport action)