Concordance line refresh management is too brutal and broke the UI

Currently when the concordance needs to refresh lines (example: a view/sort property changed) all lines are flushed and rebuild.

Problems:

- this broke the current sort

- some lines information that don’t change are lost and rebuild

• SJ: when changing a View parameter, the sort and the current page index are lost

(from redmine: issue id 1948, created on 2016/11/28 by Matthieu Decorde)

• Relations:
  • relates #2486 (closed)
  • relates #770
  • relates #2710
  • parent #1927 (closed)