Camera presets

Camera presets will operate in a similar way to graphics presets.

It will save and restore settings in the Camera Controls floater.

Certainly:

• Orbit angle (round control on Camera Controls)
• Pan location (square control on Camera Controls)
• Zoom
• View angle

Possible additional features:

• Controls related to depth of field

Preferences should also include (but not save as part of a camera preset):

• Opacity control for the Camera Controls floater

The existing Front/Side/Rear should be put into the default camera presets, and also a "Pennys Gamer Default"

Also fixed in these changes:
BUG-10398
BUG-17348
BUG-17349