Help 1st-time users after they create a 1st node

Acceptance criteria

1. After creating a first content node, add a blinking spot (tour) on menu item Branching content: "Drag Branching question and drop it below your content to create branching".

   • Mark a "Branching content" with a purple rectangle

2. After creating a first branching question, add a blinking spot (tour) on menu item Info content: "Drag and drop any content type below alternatives to create a content that will appear after an alternative is selected."

   • Mark an "Info content" with a purple rectangle

3. Please reuse the same tour we already have for the full-screen button