switch to sqlite

Billing.Shared/Views/CategorySelectPage.xaml.cs

@@ -72,7 +72,7 @@ namespace Billing.Views
                 IsChecked = c.Id == categoryId,
                 Icon = c.Icon,
                 Name = c.Name,
-                TintColor = c.TintColor == Color.Transparent || c.TintColor == default ? defaultColor : c.TintColor
+                TintColor = c.TintColor.IsTransparent() ? defaultColor : c.TintColor.ToColor()
             };
         }