Convert null descriptions to empty strings
Add unit test for PlainStyle get_rows()

OME-DCO-1.1-Signed-off-by: Sebastien Besson <seb.besson@gmail.com> (github: sbesson)
Add unit tests for table builder

OME-DCO-1.1-Signed-off-by: Sebastien Besson <seb.besson@gmail.com> (github: sbesson)
Fix TableBuilder for non-ASCII characters

OME-DCO-1.1-Signed-off-by: Sebastien Besson <seb.besson@gmail.com> (github: sbesson)
Fix flake8 warnings and rename test method

OME-DCO-1.1-Signed-off-by: Sebastien Besson <seb.besson@gmail.com> (github: sbesson)
Remove commented out code.
Populate the result table when rois are loaded.
Merge pull request #2650 from jburel/roi-results

Roi results
Merge pull request #2641 from knabar/feature-tagging-dialog-dev50-fix

Tagging dialog null description fix (dev_5_0)
Merge pull request #2645 from sbesson/12370_table_unicode

Fix TableBuilder for non ASCII characters