- The model always has two columns, and the column names are always
the same. We don't need to specially set headers for that.
- Use QCoreApplication::translation() to re-use the existing
translations and avoid creating "new" strings (in a new context).
- Use only utils/YamlUtils.h to pull in yaml-cpp and supporting code.
- When compiling with clang, turn off warnings that the system header
for yaml-cpp would generate.
