Teo Mrnjavac authored 8 years ago and Philip Müller committed 8 years ago

CAL-390 #close

Redone CalamaresWindow without UI file.
Const correctness in ViewStep and plugins.

Renamed ViewPlugin to ViewStep.
Back/Next button status management.
Subpages are now under a ViewStep's jurisdiction, we only forward back/
next signals if a ViewStep says it's got more pages to show. ViewStep
exposes a QWidget* to ViewManager, this QWidget gets added to a stack.
If a ViewStep wishes to show more than one page, it must manage more
pages on its own inside its single QWidget*.

Moved module-related classes to src/calamares/modulesystem.
Fixes to startup code path.
Made ViewPlugins load into ViewManager.
Debug code: ViewManager currently only shows a plugin's prettyName.
Added ViewModule as a subclass of Module. Other kinds of plugins should
be supported in a similar way.

Added ViewManager.
Added dummy Settings class.
Added dummy plugin interface (UI plugins only).
Added dummy greeting plugin.
Added DLLEXPORT macros for UI plugin interface and plugins.