Issue Summary

The card macro limits to only 20 cards at a time

Steps to Reproduce

1. Create a page with a card macro
2. Add 20 cards 
3. Try to add another card, 21st

Expected Results

The 21st card is also created under the card macro configuration

Actual Results

Card macro limits to 20 cards

Workaround

Add multiple card macro to insert more cards to the page