LCL, fix Qt scrolling: using SetScrollInfo to update scrollbar should not produce LM_?SCROLL events (these should only be triggered by scrollbar interaction. This also fix issue 23585

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40511 4005530d-fff6-0310-9dd1-cebe43e6787f
LCL, fix QT compile with FPC trunk, works also with FPC fixes

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40512 4005530d-fff6-0310-9dd1-cebe43e6787f