Reform the clips

From now on, clips can have actions for non-managers as well. Usability testing has shown that they are a natural place for people to look for actions and information.

Requires https://github.com/oaeproject/Hilary/pull/856

The following actions should be available

### ME
#### Current user
- [x] My picture
- [x] My profile
- [x] My account

### USER
#### Logged in
- [x] Follow / unfollow

#### Anonymous
- [x] N/A

### GROUP
#### Manager
- [x] Change picture
- [x] Manage access
- [x] Edit details
- [x] Unfollow

#### Member
- [x] About
- [x] Unfollow

#### Logged in
- [x] Join / Follow
- [x] About

#### Anonymous
- [x] About

### CONTENT
#### Manager
- [x] Download
- [x] Share
- [x] Manage access
- [x] Edit details
- [x] Upload new version
- [x] Revisions
- [x] Delete

#### Member
- [x] Share
- [x] Download
- [x] About

#### Logged in
- [x] Follow
- [x] Share
- [x] Download
- [x] About

#### Anonymous
- [x] About

### DISCUSSION
#### Manager
- [x] Share
- [x] Manage access
- [x] Edit details
- [x] Delete

#### Member
- [x] Share
- [x] About

#### Logged in
- [x] Follow
- [x] Share
- [x] About

#### Anonymous
- [x] About