[Xfce-i18n] Translate splash engine strings like "Starting the Desktop Manager"

[scootergrisen]

Den 16-05-2019 kl. 15:35 skrev Simon Steinbeiss:
> Hi everyone,
> 
> yes, the splash screens were broken since the gtk3 migration and we 
> don't have the manpower to fix them (considering their importance for a 
> functional Desktop Environment).
> So we decided to drop them, no need to translate anything there.
> 
> Cheers
> Simon
> 

Ok the text was flying by so fast anyway so could hardly read it.