Disabling rotation only disables rotation on the 2D map

[jmgomezpoveda]

The ol.view object has a flag "enableRotation", which disables the rotation on the vertical axis.

When set, this has no effect on the 3D view. one can still rotate the 3D globe in any direction, and when coming back to the 2D map, the map remains rotated.

It'd be good if enableRotation could disable rotation over the vertical axis for the 3D view as well.

Alternatively, any workaround would be appreciated.