message: Allow searching by partial prefix (/w or /wo '+')
diff: @@ -26,9 +26,14 @@ for (const c of COUNTRIES) {
  }
  function countryMatchesSearchQuery(query, country) {
  + // Remove '+' if present (when searching for a prefix)
  + if (query[0] === '+') {
  + query = query.slice(1);
  + }
  +
  if (country.name.toUpperCase().indexOf(query.toUpperCase()) == 0) return true;
  if (country.iso2 == query.toUpperCase()) return true;
  - if (country.prefix == query) return true;
  + if (country.prefix.indexOf(query) !== -1) return true;
  return false;
  }
  