Height and width set in XML have just been ignored (they were expected
as option nodes, not attributes).
This has been fixed. Please revisit your spacer sizes...

It now supports unlimited priorities

And some cosmetic fixes for the line numbering of the preview editor

The runoff should now be more or less supported

Some missing keys in the katabatic flows module have been added, some
unnecessary keys removed from MeteoIO (no need for POIs there). Some
file extensions are now specified as filters when it makes sense.