Add Key button when adding SSH keys remains blocked even when all information is correct

• GitLab version: 8.3.0-ee
• Zendesk ticket: https://gitlab.zendesk.com/agent/tickets/14103

Description of issue

When adding an SSH key to your profile, the Add Key button remains disabled until you fill in all required information. There seems to be a problem with the JS logic when the tile of the SSK key is autofilled from the contents of the key. JS does not seem to pick up that the field was filled and leaves the button on a disabled state.

If you change a character from the title, the button is enabled.

Result of replication

Just as described.

Concrete questions / Next steps

Like I said before, this seems to be related to JS not picking up on the changes.

@jschatz1 can you take a look at this please?

@rspeicher this was working before, so the fix would need to be added to 8.3 as a patch.