Plugins + Scripts Asset Bundle Preloader

Finally figured out how to use shortcuts for file browser, like other browsers have: Root, All Flattened, all vars with assets, etc, on the left side of browser. Also, it is remembering previous directory of suceffuly selected asset bundle.
FileManagerSecure class (using MVR.FileManagementSecure) has all needed functions from inacessible FileManager class.

Forgot about to call base.RestoreFromJSON

Found a bug where removed bundles still existing in the internal list and being saved. They was appear again the next time you launch VAM.