1. Create a new workspace
2. Flip the deck and in the "Filter Actions" edit box enter the letter 'd'
Note that now all the actions get grayed out except for "Delete deck" and "Mirror" actions
3. Change the 'd' to an 's' and now only the "Mirror" action is available.
I spoke with Damon and he suggested i log this as a bug as it's not clear what the intended behavior should be.
See attached screenshots for more detail