Better file sizes in Explorer details v1.4.6 (#1352)

* "Everything" integration for folder sizes: Added support for the new Everything SDK3. With "Everything" version 1.5.0.1384a or newer, the folder size query is much faster now (can be around 20x faster).
* "Everything" integration for folder sizes: Folder junctions no longer have a size (zero size was shown before).
* Fixed sorting folders by size when the "Mix files and folders when sorting by size" option is disabled.
* Folder sizes are now displayed in more places, including "Library" folders and the details pane.
* Fixed a rare mod hang on unload.