Called after the editor's maximum or minimum height or width is changed (and after the display is refreshed; use on-set-size-constraint and begin-edit-sequence to avoid extra refreshes when after-set-size-constraint modifies the editor).
(This callback method is provided because setting an editor's maxmimum width may cause lines to be re-flowed with soft carriage returns.)
See also can-set-size-constraint? and on-edit-sequence.