Liked the Turn on Sync explicit action.

Talking about this with Kai we were thinking that we should add the Turn on Sync button and also a "Last Synced..." timestamp to the settings editor outside of the setting itself. In the first screenshot, I think I like the option that puts it in the sidebar, but I could do either one.

Thoughts @misolori @sandy081?

I also liked the first option. There is no explicit last synced time for settings, I need to add it. Also, I would suggest to add enabling/disabling settings sync.

Reopening this for the discussion to use icon instead of blue button

Some concerns:

• How can the same action can be shown in Keybindings editor & Extensions viewlet? Is it consistent to go with an action with icon just like other actions? This will make it easier to adopt sync action in other places too. Why are we not going with an action with icon here?

• Re: advertising the feature - We do not follow the same for other features. We assume icons are discoverable. Advertising features is a good problem but not sure big blue buttons are the solutions.

• Also this button will be shown always to the users who do not want to sync and might be annoying.

1. Even though Sync works for more features than Settings, people seem to closely associate it with settings, and I think this comes from people in user studies opening the settings editor looking for a way to enable settings sync. Could add it to other places too but I don't know if that's necessary.
2. I might have to defer to @kieferrm or @misolori here, I don't have a strong preference either way.

We can reconsider once we see how it's perceived.

We've already added this in the settings ui: