ReviewStep: fix alignment

Patternfly6 handles the grid for description lists slightly differntly
to Patternfly5. Add custom css to change the behaviour to match PF5 and
get the items in the review step to align properly

src/Components/CreateImageWizard/steps/FileSystem/FileSystemTable.tsx

@@ -58,7 +58,7 @@ export const MinimumSizePopover = () => {
         variant="plain"
         aria-label="File system configuration info"
         aria-describedby="file-system-configuration-info"
-        className="pf-v6-u-p-0"
+        className="popover-button pf-v6-u-p-0"
       />
     </Popover>
   );