Update vi.po

Update translate vietnamese
[FIX] #1526 - Missing filename on binary fields download
This is an updated colombian chart of accounts:
- Accounts based on puc.com.co
- adatpations according to current law and last fiscal reform of 2013/14 incorporated (eg. INC, CREE)
- default: 6-numberd, 6th level are account, others views according to colombian PUC regulations
- default accounts predefined according to standard use case
- Most colombian taxes preloaded. Level of detail adjusted to present and future DIAN reporting requirements
- Complete Tax Code layout for generating all necesary transactional fiscal information, Taxes (INC, IVA, CREE), Retentions (ReteIVA, ReteRENTA), Autoretentions (AutoretentionRenta, CREE) - Including predefined cases for import/export, trade with free trade zones, and trade with Companies under the international trade regime
- EXCEPT: ICA Community tax not included, as differs greatly un per city level
[FIX] #1526 - Missing filename on binary fields download
Imprint corrections
Imprint corrections - typo
Merge pull request #1790 from thanhchatvn/patch-2

Update vi.po
Merge pull request #1800 from blaggacao/8.0-l10n_co

8.0-l10n_co
[FIX] mail: tell orm to rename column "read" to "is_read"
[FIX] HTML Questions
[FIX] HTML Questions
[FIX] website: correct unslugify of routes
[FIX] base: show "application" in view view
[FIX] point_of_sale: the receipt would not print correctly on first try
[FIX] HTML row
[FIX] point_of_sale: prevent changing the customer after printing the receipt
[FIX] project_issue: project issue user must be able to read resource calendar

In order to be able to read the days_since_creation field
[FIX] point_of_sale: updated the tooltip for the to weight option to make it clearer that it is to be used with the hardware scale integration
[FIX] models: onchange return all subfields in cache when no subfields presents
[IMP] MRP: improve Bill of Material structure tree view