Steps to Reproduce:
1. Log in as Admin and create a Private Page
2. Add Microblogs portlet to the Private Page
3. Create 2 users (User1 and User2) and provide Administrator Roles to them
4. Connect the two users by the Profile portlet, which can be set up under /web/user1 or /web/user2
5. Add Activities portlet to User1's profile page
6. Log in as User1 and add a new Microblog Entry, mentioning User2
Actual behavior: Microblogs portlet converts the mention linking it to the person's profile, the Activities portlet displays [@User2] instead.
Expected behavior: the Activities portlet displays the mention the same way as Microblogs.
7.0x @6a1f3038c429fc59586c696df30de7d44b0c3206 -> Same issue
Master @9f2cbbd236513332dca1ef619bca3dec6616a4c1 -> Same issue
Thank you for looking into this.