LDEV-4777 Further development of QB search feature* Search QB interface is now available in Q&A tool, but questions ofthis type (Essay) can only be added via DB for now
LDEV-4755 Fix files with zero length being uploaded after viruse scanAntivirus scan read the stream so it would be at its end when file gotwritten to drive.
LDEV-4721 Add class renaming filter for branching conditionsTools' entities sometimes are used in branching conditions, which are apart of LearningDesignDTO. Core XML needs to be parsed too and tools'packages renamed.