Set wallpaper type in SDDM config
Summary:
aafa20f19c87 introduces a feature to the SDDM breeze theme where it will
only show a wallpaper is a config value "type" is set to image. This
isn't the default, making this KCM useless.
This patch sets the wallpaper type when saving.
BUG: 370521
FIXED-IN: 5.9.1
Reviewers: Plasma
Subscribers: plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D4457