Improve navigation in circles section

Separate the people/edit buttons visually (although they lead to
the same page) to anticipate user intent.

tools/icons.list

@@ -8,7 +8,6 @@ communication/qr_code:qrcode
 communication/vpn_key:passwd
 content/add_circle_outline:add
 content/add_link:create_link
-content/create:edit
 content/remove_circle_outline:remove
 content/content_copy:copy
 content/link_off:remove_link
@@ -17,5 +16,7 @@ navigation/arrow_forward:forward
 navigation/cancel:cancel
 navigation/more_vert:more
 social/groups:groups
+social/people:people
 social/group_add:create_group
 navigation/close:close
+image/edit:edit