Forward port release note changes from 1.4 (#5470)
Forward port release note changes from 1.4 (#5470)

* Forward port release note changes from 1.4

* Respond to Suzanne's feedback

These changes and others should be applied to 1.4

gsantovena/marathon,guenter/marathon,mesosphere/marathon,janisz/marathon,janisz/marathon,meln1k/marathon,guenter/marathon,mesosphere/marathon,janisz/marathon,gsantovena/marathon,meln1k/marathon,gsantovena/marathon,mesosphere/marathon,gsantovena/marathon,mesosphere/marathon,guenter/marathon,mesosphere/marathon,guenter/marathon,gsantovena/marathon,janisz/marathon,janisz/marathon,guenter/marathon,meln1k/marathon,meln1k/marathon,meln1k/marathon