lcl, ide: use code compatible with JSon package from FPC 2.6.2

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@43750 4005530d-fff6-0310-9dd1-cebe43e6787f
codetools: read var postfix modifiers without first semicolon, bug 25543

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@43751 4005530d-fff6-0310-9dd1-cebe43e6787f