Driver swap option for switching which feed is on top

[EricAndrechek]

On powerful enough computers and fast enough internet connections, it may make more sense to leave all the driver feeds open rather than to close and open some and swap between them. In the current implementation, however, switching which stream is in front is not supported. While you could technically click the stream you want to remove always-on-top from and then select a new one to add this attribute to, it is not nearly as smooth as a native button for this.