[Metadata Viewer app] remove outdated Classification Scheme section

[Andreas Rabe]

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[Benjamin Jakimow]

What's the bug here / the outdated part?

[Andreas Rabe]

Our logic for Classification Schemes has changed.

The scheme is defined by the QGIS Symbology.

The Metadata Viewer is not correctly using the information from the Layer Symbology. E.g. the roof is BLUE, not RED anymore:

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[Andreas Rabe]

I would just remove this widget, because the user can define the scheme by using the Layer Properties > Symbology.

The old widget is just obsolete.

[Benjamin Jakimow]

Metadaa viewer shown internal GDAL-specific data source classes, which might not be in the applied layer style

[Andreas Rabe]

Sorry, for switching the status of the issue back and forth, but this widget is problematic/dangerous:

It is inside a “viewer”, but it has editing functionality:

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I guess it will try to save the edits to the raster source, while the raster is still opened in QGIS as a layer. So QGIS will overwrite potential changes later or other “bad things will happen”.

[Benjamin Jakimow]

edit now only shown in edit mode (optical sugar only, saving was done in edito mode only anyway)