CORE-16935
I merged that back, because at least the play-icon was a regression.
It regressed by SVN r68073 == git 888c2fb967
Ftr we did not always use an icon here, but instead earlier we just had some
font glyph displaying the play-symbol. It was once changed to icon to improve
display for some asian localization (japanese? iirc).
fix picked from commit 0.4.15-dev-86-g bdb4da009a
- Make sure the DWLP_* values are correct on _WIN64
- Don't use the DWL_* constants, they are not portable. Enforce this by removing them entirely from winuser.h
- Make sure Get/SetWindowLong*Ptr* is used and pointers are not truncated to LONG