Provide an option to display facet count in exposed filter summary

Problem/Motivation

The facet_summary module has a similar option "Show a summary of how many results were found", it would be great if this could be better to the new exposed filters based solution. When views_filters_summary is enabled, I think only the
hook_views_filters_summary_info_alter() would have to be implemented, because in that hook facet information is available, including count.

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes