IDE: package editor: multi updatebuttons

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@45447 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: package editor: edit virtual file

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@45448 4005530d-fff6-0310-9dd1-cebe43e6787f