[14.0] [FIX] pos_sale_order: Create final invoice to take in account refunds

[paradoxxxzero]

No description provided.

[codecov]

Codecov Report

Merging #62 (c19a094) into 14.0 (f0950f3) will increase coverage by 0.21%.
Report is 6 commits behind head on 14.0.
The diff coverage is 98.07%.

@@            Coverage Diff             @@
##             14.0      #62      +/-   ##
==========================================
+ Coverage   88.51%   88.73%   +0.21%     
==========================================
  Files          51       51              
  Lines         984     1012      +28     
  Branches      153      158       +5     
==========================================
+ Hits          871      898      +27     
  Misses         98       98              
- Partials       15       16       +1     

Files Changed	Coverage Δ
pos_sale_order/models/pos_session.py	76.14% <95.23%> (+0.65%)	⬆️
pos_sale_order/models/sale_order.py	85.35% <100.00%> (ø)
pos_sale_order/tests/test_closing_session.py	100.00% <100.00%> (ø)
...ale_order_no_payment/tests/test_closing_session.py	100.00% <100.00%> (ø)

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