Misleading UX when inviting users to a private room in a space

### Steps to reproduce

1. Create a private room in a space
2. Go to the room
3. Click on the invite button
4. Select a list of people to invite to the space

### Outcome

#### What did you expect?

The invite button would add them to the room and the space.


The issue is that the featured button adds them to the space. Also, the second button saying "to just this room" implies that selecting the first option would invite them to the room, and the space, which does not seem to be the case.

This behavior might be okay with public rooms, since invitees might find their way into the room by being invited into the space, but it's unexpected with private rooms in spaces.

#### What happened instead?

The invite button added them to the space and not the room. They can't join the room because it is private/invite-only.

### Operating system

Linux

### Browser information

Firefox 112.0.1

### URL for webapp

1.11.30

### Application version

1.11.30

### Homeserver

1.81.0+jammy1

### Will you send logs?

No