Merge topic 'find-wxwidgets'

8c9106538f FindwxWidgets: Support more wxWidgets versions, including 3.2
d8a2edb74e FindwxWidgets: Use version number from header for library names
2f2fe1a2e3 FindwxWidgets: Move extracting version number to a macro

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: buildbot <buildbot@kitware.com>
Merge-request: !7374