Check for empty value in quality widget. Fixes #67.
Check for empty value in quality widget. Fixes #67.

amcat/amcat,tschmorleiz/amcat,amcat/amcat,amcat/amcat,tschmorleiz/amcat,tschmorleiz/amcat,tschmorleiz/amcat,amcat/amcat,amcat/amcat,amcat/amcat,tschmorleiz/amcat