View consent/terms that was signed for a project

[madprime]

The site currently stores the copy of terms/consent a member agrees to, at the time of signing, in the consent_text field of DataRequestProjectMember in direct_sharing.models.

We should create a view that makes it possible for a member to see this, and link this view from the project's activity page (ActivityManagementView), where the link is available if a member is logged in and has joined a project.