allow changing color and scale via mouse when holding alt or shift keys; fixing/changing input for rift.

Added activatable component, which allows a button to cause secondary activations to occur while an object is grabbed. Also made the pen "sticky" so it stays attached to your hand when you grab it. It can then only be dropped by using the "primary" grab button (e.g. grip buttons). The triggers now are "secondary_action" buttons, which work like normal except in the case that you are holding a sticky object, in which case they will not cause the object to be dropped.

since it interferes with pasting

switch the super-hands on the controllers back to using action_grab/action_release and support that properly in cursor-controller.

rework the input schemas across platforms.

* Add gearvr-controls to hand-controls2

* Update AFrame.

* Update input-mappings.