Edit 'New Room' Screen

### Your use case

#### What would you like to do?
**1.** Increase the space between the header ("New room") and content below.
**2.** Use plus icon on camera.
**3.** Remove the word "(optional)".
**4.** Remove the word "Allow".
**5.** Change "No spaces selected" to "Add to space".
**6.** Change "Do not add to space" to "None" include circle-with-slash icon for alignment with other spaces.
**7.** Change "Add to Space" to "Add to..." Or remove title.
**8.** Make the "Create" button into a pill shape.

#### How would you like to achieve it?
### Image showing changes 1 to 7

### Have you considered any alternatives?

_No response_

### Additional context

Would also be useful/nice to:
- Be able to select multiple Spaces.
- Have the "Create" button at the bottom of the screen.
- A green surround on the selected text box, like EW has.
- Have better differentiation between group heading and tappable text.
- - **E.g.** Element Classic had bold headings.

### Are you willing to provide a PR?

No