PanelEdit: Make sure side pane is displayed with tabs by default (#24636)

* Make sure side pane is displayed with tabs by default

* Update e2e tests for

packages/grafana-e2e-selectors/src/selectors/components.ts

@@ -53,6 +53,7 @@ export const Components = {
       close: Pages.Dashboard.Toolbar.toolbarItems('Close options pane'),
       open: Pages.Dashboard.Toolbar.toolbarItems('Open options pane'),
       select: 'Panel editor option pane select',
+      tab: (title: string) => `Panel editor option pane tab ${title}`,
     },
     // not sure about the naming *DataPane*
     DataPane: {

packages/grafana-ui/src/components/Tabs/Tab.tsx

@@ -30,7 +30,7 @@ export const Tab = React.forwardRef<HTMLLIElement, TabProps>(
             onChangeTab();
           }
         }}
-        aria-label={selectors.components.Tab.title(label)}
+        aria-label={otherProps['aria-label'] || selectors.components.Tab.title(label)}
         ref={ref}
       >
         {icon && <Icon name={icon} />}