Remove "bad nsa structure" error message
Chart : Transfert some logic from serveur to client #2853

Transfert some logic like chart basic structure and line styles. Only returns series now.
Correct a bug and optimise display on panel for ignored and overriden values (√, X or ! icons) and their respective value
Correct unit tests #2853

Remove one test that check the full chart structure (there is no more chart structure on server side)
Add button Show/Hide question labels on JMP-NSA view #2861