Hide resources in sidebar | Pagination in ::HasMany

Created by: pikooh

Is it possible to customize which resources are being shown in the sidebar? We have some assignment groups (many-to-many relation) which should not be accessible through the sidebar.

Also, there is an automatic limit on "sub-views" (HasMany-Fields), with "Showing X out of Y" - how would one disable/override that to show all related entries, or even better, offer pagination there as well as in the main (index) views?