VolumesAndMountsPage: totals row text muting

this is because when looking at mobile, it was hard to see zoomed in that this was not an ordinary row (I was wondering which volume has like 60 TB of space...)

Author: joonas-fi

frontend/pages/VolumesAndMountsPage.tsx

@@ -486,7 +486,7 @@ export default class VolumesAndMountsPage extends React.Component<
 							<td colSpan={99}>{loadingOrError}</td>
 						</tr>
 					) : null}
-					<tr>
+					<tr class="text-muted">
 						<td />
 						<td />
 						<td>{blobCount(totals)}</td>