Introduce row truncation

Summary:
Changelog: Logs plugin will now automatically truncate long lines

...for a more pleasant experience where long messages don't distort things to much. (Made the buttons purple in a next diff for better contrast)

Reviewed By: passy

Differential Revision: D27395517

fbshipit-source-id: 733cd6329b979453ef3b428693be8c47c37adf4d

desktop/plugins/logs/index.tsx

@@ -97,7 +97,11 @@ function createColumnConfig(
       key: 'message',
       title: 'Message',
       wrap: true,
-      formatters: [DataFormatter.prettyPrintJson, DataFormatter.linkify],
+      formatters: [
+        DataFormatter.truncate(400),
+        DataFormatter.prettyPrintJson,
+        DataFormatter.linkify,
+      ],
     },
   ];
 }