Improve (and fix) the account expense indicator

lib/ui/widgets/piechart_card.dart

@@ -34,7 +34,8 @@ class ResponsiveCard extends StatelessWidget {
 
           child,
 
-          if (subtitleText != null) Text(subtitleText!),
+          if (subtitleText != null)
+            Padding(padding: EdgeInsets.all(8), child: Text(subtitleText!)),
         ],
       ),
     );