Converter: move a string constant to resource strings

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40827 4005530d-fff6-0310-9dd1-cebe43e6787f
LazUtils: Handle a temporarily non-accessible file in CopyFile function. Issue #24162, patch from Cyrax

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40828 4005530d-fff6-0310-9dd1-cebe43e6787f