I would like a default button for “my collection,” Please. Because, I accidently modified one of my stock decks. I didn’t see the “new deck” button at the bottom.
If by “stock decks” you mean the decks Hearthstone premakes for you, you can always remake the ones currently available in the new deck dialog. Older ones you can probably search up on Google. Other than that, you’ll just have to keep a record of decks you’d like to remember. If you’re on a PC, you can cut and paste a deck into any text editor, and then paste it back when you want to re-create it.
I found it. It’s under “new deck.” They call it the “Core deck.”