Packager: rename variable.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@46037 4005530d-fff6-0310-9dd1-cebe43e6787f
Package editor: don't update the whole tree after changing Min or Max version of required package. Part of issue #26188

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@46038 4005530d-fff6-0310-9dd1-cebe43e6787f