D8759: Implement SH_Widget_Animation_Duration style hint

[Elvis Angelaccio]

elvisangelaccio marked an inline comment as done.

REPOSITORY
  R31 Breeze

REVISION DETAIL
  https://phabricator.kde.org/D8759

To: elvisangelaccio, hpereiradacosta, apol
Cc: apol, plasma-devel, ZrenBot, progwolff, lesliezhai, ali-mohamed, 
jensreuterberg, abetts, sebas, mart