This makes it possible to remove QML from Calamares, possibly yielding
a smaller, lighter installer; it takes with it the nice slideshow,
modern configurable navigation and the QML UIs built for various modules.
By default, WITH_QML is on and the "normal" feature set is retained.
- look for Qml modules only when WITH_QML is on (the default)
- look for Network, since that's pulled in only implicitly
- disable the QML Calamares models (modules/*q) if no QML is
enabled; longer-term plan is to merge the **pages** back to
the "upstream" modules, and have things be run-time switchable,
but that's not here yet. Also disable the notesqml module when
QML is off.
- 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.
- To avoid name-collisions in otherwise well-behaved
modules and configurations, make the QML settings
more specific:
search -> qmlSearch
filename -> qmlFilename
- Let's just have one header definining export- and visibility-
macros for Calamares. They are still selected based on the
export flags (*_PRO), just defined in one header instead of two.
- 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.
