Problem/Motivation
If want to build a page similar to the module search page, but with better layout control, say using page_manager...
This is currently possible in D7, but needs some work in D8.
Remaining tasks
1. Add view block displays support to the facets module: #2678486: Views block display support
2. Allow exposed-form-in-block for view block displays: #2681947: Allow exposed-form-in-block for block displays This is required because the only way to embed a view into a page_manager page is a block display.
3. Make it possible to preserve URL query parameters for exposed forms: #2681953: Allow exposed form to preserve URL query parameters This is required to make it work nice with facets (that are not part of the exposed form).