New button "save and confirm" for moderated events.

When moderating events, we usually edit first the event to add some tag for instance, and then, confirm the event. The problem is that the flow is a bit tricky:

1. go to the event page. i see confirm and edit buttons. I press edit.
2. modify the information, then press save
3. i am redirected to the main page
4. i go back 2 or 3 pages. I refresh the page to check if it's really not confirmed yet.
5. i press confirm

I think that something like an extra button when editing an unconfirmed event would help a lot:

1. go to the event page. i see confirm and edit buttons. I press edit
2. modify the information. I see "save" and "save and confirm". I press "save and confirm"

An alternative would be to redirect back once saved, in case of pending events, so:

1. go to the event page. i see confirm and edit buttons. I press edit
2. modify the information, then press save
3. i'm redirected to the event page, with the confirm button. I press confirm