toggleVRRendering causes camera to lose arcball logic and inputhandler to lose custom keybindings

[smlpt]

As described in this zulip topic, turning off VR via toggleVRRendering causes the camera to lose arbcall controls and resets the FOV angle to a very wide value. When this happens, Sciview.centerOnNode() has no effect and the camera stays in FPS mode.
In the process of turning VR on and then off, the custom keybindings added to the input handler are also lost. In my testing the keybindings already did not make into the VR environment, so my guess is they get lost when enabling VR.