PRD-4924 - Report-Preprocessor-metadata missed an initialization and
 thus failed with an NPE. Also made the editor more user-friendly
  by indicating which instance is edited instead of showing a blank
  field.
Merge pull request #376 from tmorgner/PRD-4924

PRD-4924 - Report-Preprocessor-metadata missed an initialization and
Merge remote-tracking branch 'upstream/master'