To do #1071
User story #1068: Improve comprehension of speed deviations on Sprint board
Change deviation titles to improve comprehension
- Change from deviation to speed in tasks & PBIs (more positive approach) in Sprint board view.
- Added migration file to change plugin setting names.
- Updated plugin settings & labels.
git-svn-id: https://svn.ociotec.com/Software/Web/Redmine/plugins/scrum/trunk@1832 1633e602-76eb-4acd-8a1c-850ebfcfe024