Play from current device should be easier

[graebot]

I listen to spotify when I sleep, but also when I work. When I get to my desk I always have to manually select "This computer" before I can listen to my music. 
It seems to me that playing from the device you are using should be easier than using your current device as a remote control for another device.

I propose the following:

Hitting play (or whatever command to begin playing) on your device should:

* If no other device is playing, start playing the music on the current device.
* If another device is playing, show popup asking to act as remote-control for that device, or to play on the current device and disconnect the other device.

If in remote-control mode, spotify will remain in remote-control mode until "This computer" is selected from the device list.
Selecting any other device will put spotify into remote-control mode.

In addition to above, you could add a "fast-change" feature, where double-clicking the "Connect to a device" icon will switch between "This computer" and whatever remote device was selected last.