[8.x] [Serverless][8.16] Push and overlay display options added to flyout (backport #6095)

docs/detections/alerts-view-details.asciidoc

@@ -38,6 +38,8 @@ NOTE: If you've configured the {kibana-ref}/settings.html#server-publicBaseUrl[`
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 IMPORTANT: If you've enabled grouping on the Alerts page, the alert details flyout won't open until you expand a collapsed group and select an individual alert.
 
+* Click the **Flyout settings** icon (image:images/flyout-settings.png[Flyout settings icon,15,15]) to access options for displaying the alert details flyout. The **Overlay** option (which displays the flyout over the Alerts table) is selected by default. Select **Push** to display the flyout to the side of the table instead. In either display, you can resize the flyout panels to your liking. Clicking **Reset size** reverts the flyout to its default dimensions. 
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 * Find basic details about the alert, such as the:
 
 ** Associated rule