Add delete all beast button

For god's sake, just add a 'Release All Beasts' button already. This isn't funny - the league is almost 8 years old and we still lack such a basic feature. Every few maps I have to manually click through hundreds of beasts. It's absolute nonsense.
I'm sure this has been requested hundreds of times - why hasn't it been implemented yet? How hard can it possibly be to add?

+1

I can't get into doing Bestiary content, because I hate going through the tedium of cleaning out the menagerie. If I click the button, it should be safe to assume I've already put the valuable beasts in orbs to sell them, meaning everything else can be discarded.

If the reason we don't have it yet is because a ton of people are going to come out and complain when they accidentally erase their menagerie, you could resolve this by adding an "are you sure" window to confirm deleting all beasts.