Add next steps panel to inform the co-ordinator the next step in setting up their group.

- Invite new people has been added to top of right panel on group page.
- Group options moved out of group/_title and into a button container (right-top)
- Main spans on group and gome page were changed to accomodate the button container
- Buttons have also been removed in all panels and a generic bottom-panel-link styling   added to .sub-panel class.   
- 'number of invites left' moved to _invite_people partial
- pending invitations added to bottom of members panel (if count > 0)
- dropdown menus resized to accomodate new button size
- remaining see_more js code removed
- pop_up help notices remove from app and database