* Extend the cspell word list
* Remove those extensions from individual source files
* white-list licenses and such as we should not meddle with those
* Fix spelling
- s/physical_size/size/ (consistant with the slint::Window API)
- remove const of virtual function (they don't need to be const and
make implementation potentially easier)
- Move the WindowProperties in it
- make sure the Platform::Clipboard type is properly documented
- Use the actual enum in the interface (even though it is
#[non_exhaustive] so we need to slience a warning)
CC: #3265
... and provide hints in there about implementing window close requests.
Note: The links to set_size() and set_position() are not resolved, as
these virtual functions are still missing from the WindowAdapter base
class.
- Fix pre-processor include search path setup so that pre-processing
slint.h finds slint_internal.h and (most importantly)
slint_generated_public.h for the feature defines.
- Add missing documentation that caused doxygen errors.
