For db use external size if available (#1258)

Co-authored-by: Antonio Maranhao <30349380+Antonio-Maranhao@users.noreply.github.com>
diff --git a/app/addons/databases/stores.js b/app/addons/databases/stores.js
index ce2a383..06c1757 100644
--- a/app/addons/databases/stores.js
+++ b/app/addons/databases/stores.js
@@ -113,7 +113,7 @@
       return {};
     }
     const {sizes} = details;
-    const dataSize = (sizes && sizes.active) || details.data_size || 0;
+    const dataSize = (sizes && sizes.active) || (sizes && sizes.external) || details.data_size || 0;
 
     return {
       dataSize: Helpers.formatSize(dataSize),