LCL, Treeview: improve item dots. Issue #22011, patch from Anton

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41059 4005530d-fff6-0310-9dd1-cebe43e6787f
tests: less hints

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41060 4005530d-fff6-0310-9dd1-cebe43e6787f
test: comment

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41061 4005530d-fff6-0310-9dd1-cebe43e6787f
tests: ExpandFilename

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41062 4005530d-fff6-0310-9dd1-cebe43e6787f
lazutils: doc CreateRelativePath

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41063 4005530d-fff6-0310-9dd1-cebe43e6787f