Add areas to "my interests"

**Is your feature request related to a problem? Please describe.** It's great to be able to follow scopes in my profile, in the "My interests" tab but it would be great to be able to follow areas as they can be used to classify participatory processes in a thematic dimension (scopes being often used for geographic dimensions)

**Describe the solution you'd like** Add the areas to the "My interests" page. **Does this issue could impact on users private data?**

No

**Funded by** Maire de Toulouse