IDE: package editor: enable compile button: check SkipCompiler

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@42650 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: add inactive ifdef to fold-gutter popup menu (if text-selection exists)

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@42651 4005530d-fff6-0310-9dd1-cebe43e6787f