Bug#976086: geogebra: Export to PDF is broken [patch]

[Thiago Melo]

This issue seems similar to bug #985604 and related to the update to
FreeHEP 2.4. It still affects the geogebra package in bookworm.

The following patch, similar to the one applied to sweethome3d, fixes
this issue:

```
--- a/geogebra/export/GraphicExportDialog.java
+++ b/geogebra/export/GraphicExportDialog.java
@@ -56,7 +56,7 @@
 import org.freehep.graphicsio.emf.EMFGraphics2D;
 import org.freehep.graphicsio.pdf.PDFGraphics2D;
 import org.freehep.graphicsio.svg.SVGGraphics2D;
-import org.freehep.util.UserProperties;
+import org.freehep.graphicsbase.util.UserProperties;

 /**
  * @author Markus Hohenwarter
```

Regards,
Thiago