Don't show the default profile in list when no others are listed.

When user selects only 1 profile to be listed in menu, it makes the
'New Tab->' list unnecessary.  No profile will listed if the only
selected profile is the default one.

Patch by Francesco Cecconi <francesco.cecconi@gmail.com>

BUG: 245478
REVIEW: 102670
FIXED-IN: 4.8