Simplify mode button dragging logic.
Simplify mode button dragging logic.

We can only drag mode button to open the selector and we cannot
drag it to close so no need for the complex logic which was not
working anyway as expected

mer-hybris-kis3/cameraplus,mlehtima/cameraplus,alinelena/cameraplus,mer-hybris-kis3/cameraplus,mer-hybris-kis3/cameraplus,foolab/cameraplus,alinelena/cameraplus,mlehtima/cameraplus,mlehtima/cameraplus,mer-hybris-kis3/cameraplus,foolab/cameraplus,alinelena/cameraplus,alinelena/cameraplus,foolab/cameraplus,mlehtima/cameraplus,foolab/cameraplus