[Contacts] Bug fix

Bug: https://groups.google.com/forum/#!topic/sahana-eden/2RGPOCTP3-o
I had a doubt regarding the bug fix, so I opened this PR. I know why it exists, but I need to know what's the right way to fix it.
Don't use the bootstrap throbber, use throbber class instead and leave it to the CSS to define the throbber.