[Xfce-i18n] tour416: Perhaps remove "We also set some further (implicit) design constraints, loosely following Adwaita's principles."

[scootergrisen]

https://xfce.org/about/tour416 have the following text near the top:

"We also set some further (implicit) design constraints, loosely 
following Adwaita's principles."

Maybe remove it or write it differently.

I guess since it's a tour it should perhaps be kept simple and easy to 
understand for everyone.

Also maybe remove the word "upstream" from:

"New upstream Xfce icons, coming in many sizes for sharp appearance"