qutebrowser: update clean history code
qutebrowser: update clean history code

Clean webengine folder. I'm removing the history file again myself now.
`:history-clear` needs confirmation by default now. It can be
overridden, but I just started to think why the history should be
parsed, then removed, and memory cleaned again? In the end, it's just
cleaning browsing history.

paretje/dotfiles,paretje/dotfiles,paretje/dotfiles,paretje/dotfiles,paretje/dotfiles