Correctly handling keyboards (French, German...) which report right-alt
as ctrl+alt in VkKeyScan().

Splitting escape_test input tests into pure virtual keys on one hand,
and modified char key on the other.
Generating the virtual codes for the later instead of hardcoding the
results (bound to generic US keyboard).

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=52980Signed-off-by: Eric Pouech <eric.pouech@gmail.com>