Ticket #5 (new defect)

Description

Because of the new way that the input manager handles proxies the glove drawing code is broken.

The reason is that the old input manager used to keep type specific lists of all the proxies in the system. This made it possible to iterate over all of the glove proxies each frame and draw a representation of the gloves.

Now there is no such list.

Possible solution: Allow the input manager to return a list of gadget::Proxy pointers in the system. Then iterate over all of them and if they can be cast to a gadget::GloveProxy, then draw that glove. (or possibly do this for devices instead — gadget::Glove devices)