removed unused code
added MultiSelectList widget to select multiple values from a list
bugfix: forgot to save updated ExperimentProfile after removing a file
getting user roles from EFO
Array Design REF should be shown (if not empty) in SDRF preview
have to lowercase ascendant field, as standard analyzer lowercases query
bugfix: system efo terms were not loaded correctly
bugfix: sample column was not updated when valueType or  efo term suggest box is changed
code clean up: removed deprected EfoGraph feature
npe fix: set default item index to zero even if valueToIndex doesn't contain the value key