This simple Resource Pack swaps the Cherished Worlds star icon 
for a heart 
Cherished Worlds is an awesome mod that adds the ability to favorite/pin/bookmark certain worlds.
Bookmarking worlds will force them to always show up at the top of the world selection list and removes the ability to delete them until they are unmarked.
The star 
is really cool, but I thought the heart 
looked pretty neat, so I decided to publish this pack.
I hope you enjoy it :)
-Guy
p.s. it's MIT, so use it however you like! 