small layout adjustment (not pretty but ok)

src/frontend/rountangleEditor/RountangleResizeHandleComponent.tsx

@@ -73,8 +73,8 @@ export class RountangleResizeHandleComponent extends React.Component<RountangleR
 
     render() {
         return <svg
-            x={this.props.x + this.props.width - 16}
-            y={this.props.y + this.props.height - 16}
+            x={this.props.x + this.props.width - 16.5}
+            y={this.props.y + this.props.height - 16.5}
             width={15}
             height={15}
             className="re-rountangle-resize-handle"