When trying to reload a crashed web-page we seem to leak all processes, and duplicate them

Steps to reproduce:

1. Start ladybird
2. open any currently crashing page (I used http://chromium.github.io/octane/)
3. Reload and check with ps -a | grep WebContent | wc -l
4. goto 3.

Other things to note
Error messages, like

FontDatabase::load_all_fonts_from_path: No such file or directory (errno=2)

and

qt.qpa.plugin: Could not find the Qt platform plugin "wayland" in ""

Get printed for each WebContent process

Edit: These Errors are likely consequence of my setup but are a good way to tell that we are doing stuff more often than we should