ggbpopup directive

ggbpopup is an alias for ggb-popup.

Creates a button that opens a GeoGebra applet in a dialog.

Example

```{ggbpopup} 800 600 "Open GeoGebra" "GeoGebra"
:perspective: AG
:menubar: false
```

Use the canonical page for full details: ggb-popup.