feat(CreateIdentityModal): improve identity creation flow

[kimanhou]

Done

• improve CreateIdentityModal

QA

1. Run the LXD-UI:
   • On the demo server via the link posted by @webteam-app below. This is only available for PRs created by collaborators of the repo. Ask @Kxiru or @edlerd for access.
   • With a local copy of this branch, build and run as described in the docs.
2. Perform the following QA steps:
   • Go to Permissions > Identities
   • Click on "Create TLS Identity" (top right corner of the page)
   • Input a name, like "foo"
   • Press Enter, or click on "Create identity" (bottom right corner of the page)
   • Make sure the modal gives clear guidance in what the token is and how it is to be used
   • Make sure you can't close the modal unless the checkbox is ticked
   • Make sure the "Done" button is enabled after you tick the "I have copied the token" checkbox
   • Make sure the "Done" button is enabled after you click on the "Copy token" button
   • Make sure the CLI and UI tabs are correctly displayed and that you can switch from one to the other

Screenshots

Before

After

[webteam-app]

Demo

Jenkins

demos.haus

[edlerd]

Good ideas on expanding the steps to give the user direction on how to use the token. Some thoughts on streamlining the contents a bit below.

[edlerd]

Some thoughts on the ui steps. Wdyt?

[edlerd]

Some more thoughts on the presentation copy and structure after a thorough review.

[edlerd]

Thanks, nearly perfect. Two small observations below.

[edlerd]

LGTM, just tiny ideas.

[edlerd]

Great stuff, thanks for improvements :)