Sidebar header navigation improvements

[afercia]

Somehow related to #1356

It took me a while to understand that clicking the "Post" link in the Sidebar header:

switches back the sidebar to display the main settings instead of the specific setting of the block being edited:

It's a pretty neat feature, maybe a bit hidden and not so easily discoverable. Basically the Sidebar header behaves like sort of "breadcrumbs" navigation. Wondering if just renaming some controls would help making this feature more discoverable, for example changing the button label "Post Settings" and the header first level "Post" to just "Settings".

Worth also noting both terms are a bit misleading when editing a Page (and, in the future, CPTs):

[jasmussen]

Just to clarify, are you suggesting we rename the breadcrumb to "Post Settings" instead of just "Post" (and of course the CPTs)? If yes, I would agree that's a better experience 👍

[afercia]

Yep I think the "breadcrumbs" first level text (currently: "Post") should match the toggle button text and the default sidebar heading text. It could be "Post Settings" or maybe just "Settings": in the second case, there wouldn't be the need to distinguish between Post, Page, CPT...