The graphs text visibility does not depend on actual text size but on zoom level

[pierrewillenbrockdfki]

Given a very large viewport, the graph rendering still only displays text labels for a given zoom level, that is, sizing of the model relative to the viewport is the deciding factor and a tiny viewport starts displaying with tiny text while a large viewport only starts displaying texts when it would be huge as well. Boxes for external connections(? the magenta/green ones) are not affected.

Please move this issue if there is a more appropriate location.