Aspect ratio of custom background images on SDDM theme not being preserved

[tanshoku]

As the title says, when setting a custom background image to the SDDM themes for Sweet, the aspect ratio is not preserved and the image gets squished to fill the screen.

The solution is as simple as adding a line with fillMode: Image.PreserveAspectCrop to Main.qml so it looks like:

PlasmaCore.ColorScope {
    ...

    Image {
    ...
    fillMode: Image.PreserveAspectCrop
    }