- The config context object should be set earlier, otherwise
QML code will try binding to a non-existent config already
- Document that QMLViewStep::setConfigurationMap() parent implementation
should be called **last**, at the end of the subclass implementation.
- need a configuration before we can start loading (to support
the variable search paths)
- refactor showing a failure in the spinner widget. On failure,
the spinner will never go away, so a message for the user is good.
- stop clang-format from messing up the table of names.
