Hub title editor component

[Macrofig]

Can likely just cherry pick this: https://github.com/bithubapp/bithub-admin/tree/develop/components/edit_hub_name

Given a hub object

• when the hub name container is clicked, it renders the hub title text in a text input.
• if in edit mode, and when clicking outside of text input, it saves changes to hub and sets form back to "read only" mode.

Be careful when saving the hub - could there be any other un saved changes?