This patch mostly change the CSS to look more similar to the one from
kde.org/kontact.kde.org/...
common/en/top-kde.jpg is now common/en/kde.png. The files
common/en/{top-kde.jpg,top-left.jpg,top-right.jpg,kde_logo_bg.png}
are now deprecated and will be removed in KF6.
Screenshots:
{F6669957} {F6669958} {F6669960}