improve error message
add "migration analysis" to make it easier to migrate from ConstraintOccurrence to ConstraintMatch
nurse rostering: migrate to ConstraintMatch
ConstraintMatch should be used in the gui too
rename ScoreConstraintMatch to ConstraintMatch
setCaretPosition(0)
constraintMatchesDialog only needs to be shown when a solution is loaded
improve ConstraintMatch upgrade recipe
delete dead import
ConstraintMatch docs
tsp: migrate to constraintmatch