[MOD] minor UI modifications. (a note: survey settings are also included in the polls section, however if feature_polls is disabled, than the survey settings will not appear as the whole section gets hidden, not just the polls tab. I did not touch it, maybe it is intentional)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@51226 b456876b-0849-0410-b77d-98878d47e9d5