Fallback breadcrumb path

[thupsi]

When a source is disabled in the CP, entries in the corresponding section keep displaying the disabled source's title in the breadcrumb navigation, which is confusing for authors. This behaviour is correct from an implementation standpoint but not aligned with the user's mental model, which may only have access to those entries via a custom source.

Therefore I suggest that, when a source is disabled, we get the option to define a custom source to replace the "canonical" (disabled) source in the breadcrumb navigation.

Example:

Let's say we disable the News section but we define a custom source Articles under which News item entries are displayed. The breadcrumbs for News item entries will be as follows:

Entries > News > News item

The problem is that News is hidden from the author so it makes no sense to her. Furthermore, it's (by necessity) disabled (not linked), so it doesn't take advantage of the "fancy breadcrumbs" dropdown functionality .

It would be great if we could define that, since News is disabled, we want to use Articles in its place in the breadcrumbs nav, resulting in the following:

Entries > Articles > News item

Seem's better to me from a UX perspective!

[thupsi]

PS. This get's a little more complicated for singles, because, ideally, we'd want to be able to define a fallback breadcrumb path for each single section separately. Another reason maybe to ditch the "Singles" section grouping?