message: Update bookmark generation
  Adding the "Other countries" slot (hopefully)
diff: @@ -2060,6 +2060,7 @@ void HoI4World::outputBookmarks() const
  bookmarkFile << " desc = ""GATHERING_STORM_DESC""\n";
  bookmarkFile << " date = 1936.1.1.12\n";
  bookmarkFile << " picture = ""GFX_select_date_1936""\n";
  + bookmarkFile << " default_country = \"---\"\n";
  bookmarkFile << " default = yes\n";
  for (auto greatPower : greatPowers)
  @@ -2072,6 +2073,10 @@ void HoI4World::outputBookmarks() const
  bookmarkFile << " }\n";
  }
  + bookmarkFile << " \"---\"= {\n";
  + bookmarkFile << " history = \"OTHER_GATHERING_STORM_DESC\"\n";
  + bookmarkFile << " }\n";
  +
  for (auto country : countries)
  {
  if (country.second->isGreatPower() != true)
  