updating Chaco containers to use the new fixed_preferred_size attribute on enable.Component (see r23501)
updating Chaco containers to use the new fixed_preferred_size attribute on enable.Component (see r23501)

tommy-u/chaco,ContinuumIO/chaco,ContinuumIO/chaco,burnpanck/chaco,burnpanck/chaco,burnpanck/chaco,tommy-u/chaco,tommy-u/chaco,ContinuumIO/chaco,ContinuumIO/chaco