Merge topic 'findwxwidgets-lexilla'

90b77e3783 FindwxWidgets: link with lexilla
f8831a0c9e FindwxWidgets: Convert include and library paths to cmake-style
d76242ed9f FindwxWidgets: Prevent searching libraries multiple times
55072adf16 FindwxWidgets: Improve linking with scintilla
c5e3d12213 FindwxWidgets: Move wx-config specific checks inside UNIX find-style
625023cace FindwxWidgets: Include hotfix number
35d90784e9 FindwxWidgets: use IN_LIST

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !8927