[FIX] 'product_by_supplier' add pot file;
[ADD] 'product_by_supplier' fr translation;
[FIX] 'product_by_supplier' undo capitalization of some words;
Merge pull request #72 from grap/7.0-purchase_workflow_fr

[FIX] 'product_by_supplier' add pot file; [ADD] 'product_by_supplier' fr translation;