9a36e26d4a
Make wxDC and wxGraphicsContext DPI aware, i.e. add {From,To}DIP() to
them too and make the values returned from Get{DPI,PPI}() consistent
with wxWindow.
Also improve CMake build: add support for finding Cairo when not using
GTK, fix a warning when creating the inplace-config, and mark some
variables as advanced.
See #22346.