Knowledge context panel default filter option for content type

Please give a quick overview of your product feature request or feedback and note who in your org is affected by this issue [ex. agents, admins, customers, etc.]. 

This affects agents. When searching in the Knowledge context, we often don't need to see/reference Community posts, but the default filter options in the Contextual workspaces (described here) don't allow for us to set a default filter on the content type. Relatedly, any filters applied to a search in the Knowledge context aren't sticky (if an agent added a content type filter for a search on one ticket, the same filter isn't set when they open a new ticket).

What problem do you see this solving? 

Agents don't need to repeatedly apply a content type filter in the Knowledge context to filter out generally irrelevant results.

When was the last time you were affected by this lack of functionality, or specific tool? What happened? How often does this problem occur and how does this impact your business? 

This comes up at least on a weekly basis when searching for an article to add a link to in our ticket reply.

Are you currently using a workaround to solve this problem?

- Sifting through all the results.

- Applying the filter to the Knowledge context searches.

- Using the front-end KB search (where we have disabled Community posts as a search source).

What would be your ideal solution to this problem? How would it work or function?

If the default filters allowed for a filter on the content type. Or potentially if an agent's own applied filters were sticky.