GIS-Module needs upgrades

[DavidKi]

After looking into the GIS-Module I have several proposals for Improvements:

• Export: Allow two different Export-Options: one for geodata-only (like it is now) and one to export the entities with geodata and their corresponding attribute data in a tabular form.
• For the categorized style it should be possible to select specific colors and perhaps even symbols for each value of the attribute (like you can do it Desktop-GIS-Software)
• In the graduated style it would be nice if one could choose not only color but also the size of a symbol to distinguish between the classes
• The labeling feature is still a bit buggy. When a label is set, it is not possible to remove labels completely.