FIX: CLO-1815 - Debug data filter expression dialog validation fixed.

git-svn-id: https://svn.javlin.eu/svn/cloveretl.opensource/trunk-4-0@16418 a09ad3ba-1a0f-0410-b1b9-c67202f10d70
MINOR: code cleanup

git-svn-id: https://svn.javlin.eu/svn/cloveretl.opensource/trunk-4-0@16419 a09ad3ba-1a0f-0410-b1b9-c67202f10d70
FIX: CLO-4435 - Alert in the WebSiteExamples#graph/DataLoading.grf

git-svn-id: https://svn.javlin.eu/svn/cloveretl.opensource/trunk-4-0@16422 a09ad3ba-1a0f-0410-b1b9-c67202f10d70
SVN: merge from issue-clo-4144 to trunk-4-0

git-svn-id: https://svn.javlin.eu/svn/cloveretl.opensource/trunk-4-0@16424 a09ad3ba-1a0f-0410-b1b9-c67202f10d70