toolbar: limit number of min restricted calc to exacly what we need.
toolbar: limit number of min restricted calc to exacly what we need.

This change is the simplest I could do, but I think it would be better
to move _item_theme_hook inside _item_new. This is a further attempt
to fix T2777.

rvandegrift/elementary,tasn/elementary,tasn/elementary,rvandegrift/elementary,rvandegrift/elementary,tasn/elementary,tasn/elementary,rvandegrift/elementary,tasn/elementary