Make the tooltip always show.

packages/editor/src/components/post-saved-state/index.js

@@ -151,7 +151,18 @@ export default function PostSavedState( {
 					: undefined
 			}
 			onClick={ isDisabled ? undefined : () => savePost() }
+			/*
+			 * We want the tooltip to show the keyboard shortcut only when the
+			 * button does something, i.e. when it's not disabled.
+			 */
 			shortcut={ isDisabled ? undefined : displayShortcut.primary( 's' ) }
+			/*
+			 * Displaying the keyboard shortcut conditionally makes the tooltip
+			 * itself show conditionally. This would trigger a full-rerendering
+			 * of the button that we want to avoid. By setting `showTooltip`,
+			 & the tooltip is always rendered even when there's no keyboard shortcut.
+			 */
+			showTooltip
 			variant="tertiary"
 			icon={ isLargeViewport ? undefined : cloudUpload }
 			// Make sure the aria-label has always a value, as the default `text` is undefined on small screens.