Includes support for trackpad event data

Fix for new steam vr version that adds many events causing
delays in butten response.

Fixes picking when using multisamples.

Better hardware picking by starting at the center pick point
and working out.

New menthods in the menuwidget and rep to rename/remove menu items

Remap next pose control to left trigger so as to not overload
the grip buttons.

Handle higlighting of picked lines and polylines better.

Fix issues with the panel representation when it is called
before the controllers have been loaded.

Fix an issue when hardware line width was being forced by the
render window to a different value.

Better handling of pose for unloaded or untracked devices.