I feel your pain on this one. I actually noticed my phone stuck in dock mode since the last update to the "Dot View" application. I'm contemplating if it has anything to do with the dotview case/update. I currently forced closed the dock app, turned off the M8, and turned it back on. I currently have it connected to my computer via usb and so far it is not back on. Yes, I removed the dot view case prior to turning the M8 back on.
I'll let you know how long this fix lasts and if and when I do put the dotview case back on if the problem persists from there.