[Admin UI] Consistently adding Indicator of Channels in detailviews of channel-aware entities

[seminarian]

This is regarding the Admin UI.
For facets and Collections there's currently no indication (in detail view) of which channels these are assigned to.
As well no possibility for changing the channels which they are assigned to (in the detail view).
I think those would be helpful for improving Admin UX.

E.g. The Products detail view does have these UI elements provided.

Something that might be worth considering as well:
There could be read-only channel indicators (for entities that only can be assigned to one channel at the same time) in the detail view, e.g. for:

• Promotions
• Shipping Methods
• ...
  Though actually the Channel dropdown in the topbar might have this already covered.

Example of UI element in Product Detail view

[dlhck]

Could be done together with #2903