Packager: Update editors always when package is modified, not only after first modification.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@46116 4005530d-fff6-0310-9dd1-cebe43e6787f
Packager: Optimize package editor update a little.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@46117 4005530d-fff6-0310-9dd1-cebe43e6787f