Pixmap cache profiling events are inconsistent

a, A QQuickPixmapReply isn't reported if it's canceled after the reply has been received but before it is processed by QQuickPixmapReply::event. That means for some pixmaps we profile a PixmapLoadingStarted but no PixmapLoadingFinished or PixmapLoadingError. The profiler will then erroneously assume that the picture never finished loading.

b, The cache counts are reported before they are updated in certain cases and after they are updated in others. This makes it hard to figure out if a certain picture was cached or rather uncached.

c, The request or implicit sizes are reported instead of the size actually stored in memory. In most of the cases those are the same, but if a sourceSize attribute is given they may differ.