Fix for the problem where when an operator is shown for the filter query
Fix a problem simple filters are not positioned correctly
Fix problem retrieving xref mref with lookup attributes instead of
unique attributes
Merge branch 'master' of github.com:molgenis/molgenis into feature/simplified_filter_UX_2649
Implements the SQL Logic Operator Precedence: And and Or
Disable the mref operator selector when less then 2 choices are made
automated merged
Merge pull request #1695 from jjettenn/feature/simplified_filter_UX_2649

Feature/simplified filter ux 2649