decorations: Decoration Positioner (#3800)

src/SharedDefs.hpp

@@ -39,7 +39,7 @@ struct SWindowDecorationExtents {
         return SWindowDecorationExtents{topLeft * scale, bottomRight * scale};
     }
 
-    SWindowDecorationExtents floor() {
-        return {topLeft.floor(), bottomRight.floor()};
+    SWindowDecorationExtents round() {
+        return {topLeft.round(), bottomRight.round()};
     }
 };