These are all in the Activity Editor as part of our design efforts with the editor.
We realize that working in the editor, you may have a lot going on. Answers - an really good ones too - can have a lot of parts. That's why you can now collapse the answers in the editor.
Here's what that looks like:
You start in a collapsed view. Then, when you need to expand it, just click on the component's title to open it wide up!
When you delete a component in the editor, you will now receive a confirmation modal:
When you're in the Editor, the tabs now look more ... tab-ish.