Fixed issue #7998: Underscore character in subqestion code breaks export of Array (numerical) questions
Fixed issue #8175: In administration preferences e-mail addresses are never validated before saving them
Fixed issue #8088: Error: JSON undefined on IE while click on change chart type button on statistics
Fixed issue: Error when viewing participants in CPDB
Fixed issue #7919: Uploading duplicate participants erases data
Fixed issue #7956: No randomisation in Matrix questions with only two answer options