Approach model (space bar in fly mode) only works if view is called "view3D"

Due to unfortunate typo in approachObject() function, it only works if view has id  "view3D", which happens to be the default id for View3D items.

• Create 3d project
• Activate 3d view and use fly mode
• When the cube is in crosshairs, press space

--> Works as expected, camera moves close to cube

• Rename View3D to something else, e.g. "foobar"
• Activate 3d view and use fly mode
• When the cube is in crosshairs, press space

--> Nothing happens (Actually the puppet crashes the first time, but actually nothing happens subsequent times)