add test story

code/addons/docs/template/stories/docs2/UtfSymbolScroll.mdx

@@ -0,0 +1,14 @@
+import { Meta } from '@storybook/addon-docs';
+
+<Meta title="UtfSymbolsScroll" />
+
+## Instruction
+
+> Instruction below works only in iframe.html. Unknown code in normal mode (with manager) removes hash from url.
+
+Click on [link](#anchor-with-utf-symbols-абвг). That will jump scroll to anchor after green block below. Then reload page and 
+it should smooth-scroll to that anchor. 
+
+<div style={{ height: "1500px", background: "green", color: "white" }}>Space for scroll test</div>
+
+## Anchor with utf symbols (абвг)