Merge pull request #8033 from jmcanterafonseca/progress_bb_final

Bug 835763 - [Contacts UX] [Activity Indicator] Wrong use of spinner when importing SIM contacts(cherry picked from commit be6d12dc417005c8bb83396bc1a8e5519917f028)
(cherry picked from commit 00792ca6be73a292541fc53b5172d342c5028215)