QT WebView render process crashes on dpi change

Changing the display DPI level appears to crash the webengine, with an exit code of -2147483645.

Can be easily reproduced by running the simplebrowser example then changing the DPI level, which clears the screen and throws a dialog box with a message of "Render process exited with code: -2147483645" followed by asking the user if they want to reload the page.