Replace placeholder with gray lotus

app/src/main/java/app/insti/adapter/FeedAdapter.java

@@ -30,6 +30,6 @@ public class FeedAdapter extends CardAdapter<Event> {
 
     @Override
     public int getAvatarPlaceholder(Event event) {
-        return R.drawable.lotus_sq;
+        return R.drawable.lotus_placeholder;
     }
 }

app/src/main/java/app/insti/adapter/GenericAdapter.java

@@ -34,6 +34,6 @@ public class GenericAdapter extends CardAdapter<CardInterface> {
         if (cardInterface instanceof User) {
             return R.drawable.user_placeholder;
         }
-        return R.drawable.lotus_sq;
+        return R.drawable.lotus_placeholder;
     }
 }