Allow filtering on attached Model+id

[jlsjonas]

This is a feature request.

Prerequisites

yes

Description

The data is already there; expose a FE filter to only show the activity for a certain model_class+model_id combo

[mauthi]

+1 for this feature. It would also be nice if you can create a link from a row in the model table to all related activity logs.

If you think this is useful and if you can give me a small hint how to start I can try to provide a PR.