#Identities: When editing identities, the Cancel button doesn't appear to do anything

[castaway]

Describe the bug
See title.

To Reproduce
Steps to reproduce the behavior:

1. Go to account/identities
2. Click on Edit on an identity
3. Start typing in the Signature box
4. See the card behind the edit box update as you type
5. Click Cancel on the edit dialog - the content you typed is still shown in the card
6. Refresh the page - the content is now gone

Expected behavior
Cancel button on the edit dialog returns the card/page to the status it was before beginning to edit

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
Add any other context about the problem here.