Config dialog shows error on KWin 5.25

[matinlotfali]

When I click on config in System Settings -> Workspace Behaviour -> Desktop Effects -> ShapeCorners -> Config , I get the message below:

[edpil02]

Perhaps related to :
Luwx/Lightly#177

[matinlotfali]

@edpil02 Thanks. It was not exactly that issue. But looking at the same area, I found an incorrect address.
It is now fixed.

[alex1701c]

There were multiple places where the plugin loading using keywords was deprecated and consequently removed.

I have some small cleanup in the work for this repo, but currently get build failures. I will make a MR in KWin master that allows us to address the issue it here.

[matinlotfali]

Thanks your MR #41 is approved.