fakeScreenRounding=false -> corners when not fullscreen (#248)

.config/ags/modules/screencorners/main.js

@@ -2,12 +2,12 @@ import Widget from 'resource:///com/github/Aylur/ags/widget.js';
 import { enableClickthrough } from "../.widgetutils/clickthrough.js";
 import { RoundedCorner } from "../.commonwidgets/cairo_roundedcorner.js";
 
-export default (monitor = 0, where = 'bottom left') => {
+export default (monitor = 0, where = 'bottom left', useOverlayLayer = true) => {
     const positionString = where.replace(/\s/, ""); // remove space
     return Widget.Window({
         monitor,
         name: `corner${positionString}${monitor}`,
-        layer: 'overlay',
+        layer: useOverlayLayer ? 'overlay' : 'top',
         anchor: where.split(' '),
         exclusivity: 'ignore',
         visible: true,