UX: Try tweaking how soon images are lazily loaded

UX: Try tweaking how soon images are lazily loaded

diff --git a/app/assets/javascripts/discourse/lib/lazy-load-images.js.es6 b/app/assets/javascripts/discourse/lib/lazy-load-images.js.es6
index 4be70c1..cd0c8e7 100644
--- a/app/assets/javascripts/discourse/lib/lazy-load-images.js.es6
+++ b/app/assets/javascripts/discourse/lib/lazy-load-images.js.es6
@@ -1,5 +1,5 @@
 const OBSERVER_OPTIONS = {
-  rootMargin: "50%" // load images slightly before they're visible
+  rootMargin: "66%" // load images slightly before they're visible
 };
 
 // Min size in pixels for consideration for lazy loading

GitHub sha: 4b796eeb