Switching primary display should be instant

If possible, it'd be awesome to make "starring" a display as Primary apply the change instantly. This would help users understand what starring the display does, and it's unlikely to be a difficult-to-revert action if it's not what they intended.

Launchpad Details: [#LP1349658](https://bugs.launchpad.net/bugs/1349658) Cassidy James Blaede - 2014-07-29 02:34:17 +0000

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