Ignore empty key localized strings.

src/LocalizationFile.cpp

@@ -31,6 +31,8 @@ void LocalizationFile::LoadFile(const std::filesystem::path& path) {
         std::stringstream linestream(line);
         std::getline(linestream, key, sep);
         std::getline(linestream, value, sep);
+        if (key.empty())
+            continue;
         _map[key] = value;
     }
     file.close();