I want to propose using the same top bar as we do in the Full Site Editor. Using the same bar will help us solve some responsive issues we have and, in the long run, make the interface more predictable and easier to understand and to update.

Here's the first proposal:

We could have this simple toolbar that gives access to:

• Undo/redo
• Switching menu
• Save
• Settings

Users switch menus or create new ones by clicking on the name of the menu, which I think is consistent with the Template editor, but we could make the options more explicit with a slightly different version:

The downside of this approach is that the bar is more crowded.

Finally, here's a simple example of how this new top bar would look on the page: