Bug 1024715 - Create test_firefox_accounts_login to validate user authen...

...tication from Settings and FMD R=zacc,bebe
I've removed the sleep in the enter_email function and no problem there.
However, I'm a bit baffled by the other two functions in which I've injected sleeps.  
Even when I preceed these with some kind of additional 'wait_for_element_displayed'  or 'wait_for_element_present', it fails with an element not found.  When I re-inject the sleep, it passes.  Is there something else I can try?
I talked about this with Bebe, and he said you guys have some tricks up your sleeve for this kind of stuff :)