Fixed issue:#07881: Only survey owner has access to the survey
#8175 fix
Fixed issue #7919: Uploading duplicate participants erases data
A few minor corrections for pull-request 137.
Fixed issue #7956: No randomisation in Matrix questions with only two answer options
Dev Fixed incorrect usage of empty (pre 5.5 empty only works for
variables).
Fixed issue #8223: Default email texts are not well formatted
Fixed issue #8018: Description and welcome sections of Show Logic File not translated
Dev Fixed some more incorrect usages of empty().
Updated translation: Czech by slansky
Updated translation: German by actxcellence
Updated translation: Norwegian (Bokmål) by pmonstad
Updated translation: Norwegian (Nynorsk) by pmonstad
Updated translation: German (Informal) by actxcellence
Dev: changed a label (consistency with a correction in 2.05)