Add back hashSpy

packages/react-shared/src/components/anchor_title.tsx

@@ -69,6 +69,7 @@ export class AnchorTitle extends React.Component<AnchorTitleProps, AnchorTitleSt
                 </div>
                 <ScrollLink
                     to={this.props.id}
+                    hashSpy={true}
                     offset={headerSizeToScrollOffset[this.props.headerSize]}
                     duration={constants.DOCS_SCROLL_DURATION_MS}
                     containerId={constants.DOCS_CONTAINER_ID}

packages/react-shared/src/components/nested_sidebar_menu.tsx

@@ -94,6 +94,7 @@ export class NestedSidebarMenu extends React.Component<NestedSidebarMenuProps, N
                         key={`menuItem-${menuItemName}`}
                         to={id}
                         offset={0}
+                        hashSpy={true}
                         duration={constants.DOCS_SCROLL_DURATION_MS}
                         containerId={constants.DOCS_CONTAINER_ID}
                     >
@@ -124,6 +125,7 @@ export class NestedSidebarMenu extends React.Component<NestedSidebarMenuProps, N
                             <ScrollLink
                                 to={id}
                                 offset={0}
+                                hashSpy={true}
                                 duration={constants.DOCS_SCROLL_DURATION_MS}
                                 containerId={constants.DOCS_CONTAINER_ID}
                             >