- This is utility code, so it can be in the QML "service"
from Calamares, rather than in the QmlViewStep itself.
That makes it usable for other QML bits as well.
- The name is just the module identifier, and now we
search for *m@i* and also *m* from that identifier,
the name becomes much less important -- and it
can be set from the config key *qmlFilename* as well.
- 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.
