3d asset previewer: Abstracted the loadFile() func, to run for every kind of file. Added a callback to loadFile to manage delayed-async file load operation.
3d asset previewer: Abstracted the loadFile() func, to run for every kind of file.
Added a callback to loadFile to manage delayed-async file load operation.

DigiArt-project/WordpressUnity3DEditor,DigiArt-project/WordpressUnity3DEditor,DigiArt-project/WordpressUnity3DEditor,DigiArt-project/WordpressUnity3DEditor