- Move widget behavior into its own container / widget class
- Change the RequirementsChecker class to just check the
requirements, returning a results list
- Connect from the module manager to the results widget.
- Move type and rename it; put in Calamares namespace
- Emit signals from the viewmanager as results come in
- Remove state changing from welcome view step based on its internal
requirements checking (for now this breaks progressing past the
welcome page)
- Log checking of the requirements
