Header not showing properly

[manusoftar]

Im not sure if this is precisely an issue or is by design buy either way it would be useful to have an alternative to this behaviour.

The headers wont adapt to their contents on a reasonable way as you can see on the following screencap

Now it could easily adjust as follows on the same space

I wonder if there is any way to enforce that way of adjusting?
Sorry for my bad english it doesn't happen to be my first language...

Thanks