message: Add missing text key
diff: <Italian>[ICON_BULLET]Nuclear Plants will become obsolete.</Italian>
  <Spanish>[ICON_BULLET]Nuclear Plants will become obsolete.</Spanish>
  </TEXT>
  + <TEXT>
  + <Tag>TXT_KEY_EVENT_NUCLEAR_MELTDOWN</Tag>
  + <English>The worst has occurred! One of our reactors has suffered a nuclear meltdown!</English>
  + <French>The worst has occurred! One of our reactors has suffered a nuclear meltdown!</French> <!-- needs translation -->
  + <German>Der Schlimmstfall ist eingetreten! Einer unserer Reaktoren hat eine Kernschmelze erlittern!</German>
  + <Italian>The worst has occurred! One of our reactors has suffered a nuclear meltdown!</Italian>
  + <Spanish>The worst has occurred! One of our reactors has suffered a nuclear meltdown!</Spanish>
  + </TEXT>
  <TEXT>
  <Tag>TXT_KEY_EVENT_HARBORMASTER_1</Tag>
  <English>The Harbormaster[PARAGRAPH:1]You are tasked by your merchant marine industry to build enough [COLOR_BUILDING_TEXT]Wharfs[COLOR_REVERT] for them to become the undisputed trading kings of the sea. You will also need to build a fleet of [COLOR_UNIT_TEXT]Caravels[COLOR_REVERT] to help carry cargo across deep water.</English>
  