When too many columns exist, some are hidden which is okay.
However when clicking on Export Table, all columns should be listed, and not the visible ones only. Currently it's not possible to export all the data at once.
The export CSV needs to be rewritten. It currently uses the JTable directly, and it should use the graph attributes. Doing this will also fix the problem that columns Source, Target and Type from edge table are localized when exported and they should not be for importing the data back.
Fix Issue #628 : Spreadsheet export is now able to export hidden colu…
…mns in data laboratory and is not affected by localization.