 Ok, so in Plasma 5.21 I introduced a new feature I call Margin Areas. Let's add a margin separator widget to activate it. How does this work? Well, you can see that the margin is bigger to the right of the separator. We can move it and the widgets will resize accordingly. This feature is actually pretty powerful. We can add more than one margin separator, allowing for so many different combinations. In fact, every separator will switch the panel margin so we can play with them as much as we'd like. The idea behind this is to make icon sizes in the default panel more consistent, but if you don't like it, just remove the separator which will turn it off. For a theme to support this, the thicker margin needs to be included in the panel background SVG as a thick, int margin. That was all folks, I'm out.