[FIX] account_aged_partner_balance: accurate total

In some cases when the move was partially reconciled, the amount of the move wasn't added to the total
This is related to rev. abe5c803a0e36f18aec4cc56abc289f66329a749
[FIX] purchase: cancel PO lines and set related procurements in exception on cancelation of a PO
[FIX] base: Malaysian currency

Default Currency for Malaysia is MYR (Malaysian ringgit), not MXN (Mexican peso)
Fixes #4193
[FIX] sale_margin: margin handle included taxes for sale

Another fix should probably be build for purchase price, but it isn't that easy, we need to know the partner to which the product has been purchased, as taxes are partner/country dependent.

Besides, included taxes in purchase prices happen less often.
[FIX] account: accurate amount total due with partial reconcile

This is related to rev. db98434e85be8ae0dfdb580a263704e3bac454e2

rev. abe5c803a0e36f18aec4cc56abc289f66329a749 forgot some partial reconciliations when the date domain was other than BETWEEN (for instance, <= stop date or >= start date, alone, not between)
Besides, the rev. abe5c803a0e36f18aec4cc56abc289f66329a749 did not care about account move being posted or not.

rev. db98434e85be8ae0dfdb580a263704e3bac454e2 took several times the same partially reconciled moves lines
Fix #4234: try block is too large and hide the get_param permission error. Use the superuser for get_param to allow the link to be created
Merge branch 'fix_issue_4234' into 7.0