reComputeSlides method
void
reComputeSlides()
Implementation
void reComputeSlides() {
slides.clear();
// fix the slideIndex also
var index = 0;
for (var sg in presentationSlideGroups) {
for (var s in sg.groupSlides) {
s.slideIndex = index;
slides.add(s);
index++;
}
}
}