[13.0] [IMP] sale_order_validity: Set the validity date be editable by the sales manager.

[nicomacr]

No description provided.

[codecov-io]

Codecov Report

Merging #383 (fa276a1) into 13.0 (fb649b0) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             13.0     #383   +/-   ##
=======================================
  Coverage   50.86%   50.86%           
=======================================
  Files          50       50           
  Lines         979      979           
=======================================
  Hits          498      498           
  Misses        481      481           

Impacted Files	Coverage Δ
sale_order_validity/models/sale_order.py	74.35% <ø> (ø)

[coveralls]

Coverage remained the same at 50.868% when pulling fa276a1 on adhoc-dev:13.0-h-32815-nmr into fb649b0 on ingadhoc:13.0.