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
- Increase the height of the trackbar in order to make it fully visible.
- Remove the selection range code.
- Set a range from 0 to 500 and fix the volume calculations accordingly.
- Set a tick frequency of 50 and a page size of 100.
- Play the default sound on TB_ENDTRACK notifications.
