Please describe the problem:
The GTK_JUSTIFY_FILL doesn't work for the GtkLabel widget. Well it has never
worked properly, but hopefully it will in future releases?

If one display a relatively length text the GTK_JUSTIFY_FILL will wrap the line
where it pleases and try its best to make a text block. However if the parent
widget gets resized the text in the label does not get resized to fit the new
change.

I hope this can be improved in future releases.

Steps to reproduce:
1. Make a window
2. Add a label with text and set justifying to FILL
3. Compile and run the program
4. Resize the window


Actual results:
No changes happens to the text

Expected results:
Change of text wrapping

Does this happen every time?
yes

Other information: