Unlike under Mac (see previous commit), this never worked correctly in
wxMSW at all, only SetScaleFactor() could be used to change the scale
factor of the bitmaps there.
Fix this and make CreateWithLogicalSize(..., scale) result in
GetScaleFactor() returning the same scale for the resulting bitmap, as
expected, under MSW too.
Also add a unit test verifying that this holds.
This directory contains tests for the library and is mostly useful for the
library developers. See the samples subdirectory for the examples that are
more useful to the application developers using the library.
If you do work on the library itself and would like to modify an existing or
add a new test, please see docs/contributing/how-to-write-unit-tests.md for
more information.
This file also contains the instructions for running the tests if you'd just
like to do it to confirm that the library works correctly.