synedit: less hints

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@42741 4005530d-fff6-0310-9dd1-cebe43e6787f
synedit: fixed TCustomSynEdit.WMMouseWheel DoMouseWheel shiftstate

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@42742 4005530d-fff6-0310-9dd1-cebe43e6787f