Manage new currencies

[Pierlam-dev]

These ones:

Thailand -> Baht
https://en.wikipedia.org/wiki/Thai_baht

Malaysian -> Ringgit
https://en.wikipedia.org/wiki/Malaysian_ringgit

Indonesia -> Rupiah
https://en.wikipedia.org/wiki/Indonesian_rupiah

Vietnam -> Dong
https://en.wikipedia.org/wiki/Vietnamese_%C4%91%E1%BB%93ng