Bug 870626 - [MMS] Placeholder is not in input box. Regression. - r=borjasalguero

Closes bocoup/gaia#4
Bug 870536 - [MMS] 'enableSend' method is not working as expected - r=borjasalguero

Closes bocoup/gaia#3
Bug 870618 - [MMS] Live-search panel is not cleaned after sending a SMS.