Mobile widget dragging is still enabled in portrait mode (iPhone)

[hopkinschris]

The ability to drag widgets around should only be enabled on desktop. When a user hits the mobile version we should disable dragging. This works as expected in landscape mode on iOS, and responsively on desktop, but it doesn't work as expected on iOS in portrait mode.

I think this is indirectly locking up the screen for iOS users in portrait mode.

I'm suspecting it's related to the sleep widget chart animation taking a little while on mobile. Perhaps we should disable all chart animations on mobile for the sake of speediness?