Nearing completion: Load GUI Screen 1

Not much left to do now.

-Multi-selecting works well now.

-Copying objects and groups.

-Sorting preview list.

-Removing from preview list.

-Holding shift now makes movement and rotation slower for more precision.

I have made some progress on the new load-object GUI.

This is the first of three to four screens that will be shown to the user. The left set of arrows select the desired object from a list. If "confirm" is clicked, the small view and other set of arrow appear, and the user can rotate and zoom around the loaded object, and scale it by clicking these arrows. The only other thing I plan to put on this screen is a way to select the category, and then a button to continue on to the next screen. Currently the only object format supported is .x, and I may add support for .3ds or .bsp maps.