Bug 866660 - [Dialer] Call Log not rendering correctly (follow up of 845097) (r=basiclines)

This is a follow up of bug 845097 due to the inclusion of a left padding (https://github.com/mozilla-b2g/gaia/blob/817939fc85f8f81c287ee958db497a964817cae0/shared/style_unstable/lists.css#L43) which is not expected in the Call Log rendering :-) This left padding breaks the rendering of the Call Log.