When I choosing the new Wallpaper Type in Desktop Settings, configuration resets to ZEROS, because values from main.xml and ~/.config/plasma-org.kde.plasma.desktop-appletsrc aren't read.
This bug isn't presented in Plasmashell 5.5.3, but 5.7.3 affected
Steps to Reproduce:
1. Go To the Desktop Settings
2. Choose "Plain Color" and get random color for Desktop Wallpaper
3. Push the "Apply" button
4. Switch Wallpaper Type to the "Slideshow"
5. Push the "Apply" button
6. Switch to the "Plain Color"
7. Now "Plain Color" button is BLACK
This bug completely negates the live wallpaper settings for Plasma 5.
Bug reproduced on these live wallpapers:
Created attachment 100675 [details]
Bug on Bizier Clock Live Wallpaper
Created attachment 100676 [details]
No bug on Bezier Clock Live Wallpaper (Plasma 5.5.3)
Created attachment 100677 [details]
Bug on Config Snow Live Wallpaper
Created attachment 100678 [details]
No bug on Snow Live Wallpaper (Plasma 5.5.3)
*** Bug 366390 has been marked as a duplicate of this bug. ***
*** Bug 374691 has been marked as a duplicate of this bug. ***
*** This bug has been marked as a duplicate of bug 375532 ***