... and of QLinkedList.

The change in QDesignerAbstractPropertySheetFactory is
straight-forward.

The rest are little buggers:

- In macdeployqt, the code iterates inside an if. Weird, but portable.

- In CppCodeParser, it's still somewhat harmless: just a call to
  std::remove_if to avoid running into quadratic complexity, even
  though the original loop had a good idea of iterating backwards,
  saving at least some copies in the process. Need to take care there
  that we continue to find the _first_ main.cpp, not the last, so add
  a check for mainCpp.isEmpty().

- In QtGradientStopsModel, however, needed to work around the absence
  of QMap::rbegin()/rend(), and it shows why they're missing: QMap's
  funky op* makes it impossible to just use std::reverse_iterator to
  do the heavy lifting. Use the recently-added QKeyValueIterator to
  get an approximation. I say 'approximation', because that one lacks
  operator->, so we need to use (*it).first, which brings back
  memories of Qt 2's iterators...

Change-Id: I051e64b8d36b04ed2e7cf7695d9b797f08efaccb
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>