Fixed Streams/related tool "refresh" method. When "refresh" calling clear tool.previewElements object  too.
Fixed Streams/related tool "refresh" method. When "refresh" calling clear tool.previewElements object  too.

AndreyTepaykin/Platform,Qbix/Platform,EGreg/Platform,EGreg/Platform,EGreg/Platform,AndreyTepaykin/Platform,Qbix/Platform,Qbix/Platform,EGreg/Platform,AndreyTepaykin/Platform,AndreyTepaykin/Platform,Qbix/Platform