Bug 874330 - CostControl Widget in utility tray does not ellipsis a over...

https://bugzilla.mozilla.org/show_bug.cgi?id=874330

1. Title : [CostControl] Widget in utility tray should ellipsis long text.
2. Precondition : Make the cost control widget display a very long text.
                  1) Remove SIM card
                  2) Change language to Brazilian Portuguese
3. Tester's Action : Expand the utility tray and observe the very long text.
4. Detailed Symptom (ENG.) : The very long text is not well-trimmed.
5. Expected : The very long text would better ellipsis in a single line.
6.Reproducibility: Y
           1)Frequency Rate : 100%
7.Gaia Revision: a503d9a1d0a588f3689243c1ddc0f016ede51b9d
8.Personal email id:  hanj.kim25@gmail.com