- Config already *has* everythind, but drop the useless copies
and duplicated code from the Page
- Plug the models model into the Page
- While here, document the model / layout / variant distinctions
The code doesn't fill the UI properly, and the drop-down
for the models combobox is not right, but at least the data
is shared.
- point to main Calamares site in the 'part of' headers instead
of to github (this is the "this file is part of Calamares"
opening line for most files).
- remove boilerplate from all source files, CMake modules and completions,
this is the 3-paragraph summary of the GPL-3.0-or-later, which has
a meaning entirely covered by the SPDX tag.