[Enhancement]: Improve the access to saved Playground

[fellyph]

Describe the solution you'd like

Recently, while talking with the folks from WPCredits, some students reported that they are struggling to find the saved Playgrounds. I have shared the new Save button, but the access to the saved Playground may not be clear to the students who need a few clicks and sometimes scroll to find it.

Describe alternatives you've considered

We can add some hints when the saved Playground can be found in the save playground modal:

Adding quick access to the saved playground:

Additional context

Also, another point to be considered is that at the "Launch Playground Panel", the screen can be too small and the user can't see on the first fold the list of saved playgrounds:

Adding some navigation at the top could help in this case