Change all child switches to off while parent switch is off

In the Media sharing settings, it's not entirely clear that things are not being shared when the big switch is turned off. While the big switch at the top is off, we should also toggle the other switches to off.

Launchpad Details: [#LP1527835](https://bugs.launchpad.net/bugs/1527835) Daniel Fore - 2015-12-19 06:47:44 +0000

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