Add missing i18n tokens/texts related to Edit API Metadata form

[brylie]

Related to #965

Add missing i18n tokens/texts related to Edit API Metadata form:

• Edit metadata form (opens from Metadata view)
  • Organization
    • Name
    • Description
  • Contact
    • Name
    • Phone
    • Email
  • Service
    • Name
    • Description
    • Valid since
    • mm/dd/yyyy (format needs to be localised)
    • Valid until
    • mm/dd/yyyy (format needs to be localised)
    • Service Level Agreement
  • Submit (button)