Remove redundant userB name in the conversation card

[Svenstar74]

User story

In the conversation drawer on the page '/sharelink', you can see all of the conversations you have. Currently, the userB name is shown twice, which is rather unnecessary. The larger version of the name should stay, while the smaller one on top should be removed. It isn't exactly clear what the messages should say. Eg. 'Prepare to talk with UserB' could just become 'Prepare to talk'.

Acceptance criteria

• For every possible state of a conversation card, there's always only one mentioning of the userB's name.