* IMP - Now the description will be an html son we can show rich styles
in the customers report.
* FIX - On locked sale orders it was need to unlock them to be able to open an RMA.
* IMP - Make the description label visible in the backend form so the
user can easily spot it.
* IMP - Added date and deadline filters.
* IMP - Added pending RMAs filter.
* IMP - Added late RMAs filter.
* IMP - Added danger decoration in tree view
- Now it's possible to open several RMAs in a sale order from the portal
- A new comment button has been added to allow the portal user to enter
relevant information like serial numbers o issue description.
- If the requested operation isn't set no RMA will be opened
- The RMA product qty is now a numeric control with limits according to
the qty available to return
[FIX] rma,rma_sale: fix linter errors
