QStyleHelper: Use palette cache key in pixmap key

This reverts commit d7bcdc3a442b99c2caebd4cfd38de67e14090e05.

Now that QPalette::setBrush() is a bit smarter (see
c564779c071b35fddb76f4e50afda4305b634651), we can be
confident the palette's cache key won't change so often.
Therefore, we can use it again as part of every pixmap's
cache key.

Change-Id: I5cab2296a937f9149c7745291e0442eea24f4e9d
Task-number: QTBUG-65475
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>
(cherry picked from commit 1e75dcf2518e37a7b83d006a4e002f972615b43b)
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@qt.io>

0 files changed, 0 insertions, 0 deletions