Archive Sync is no longer part of the import process.
-matchToArchive: shows url with current archive id if the game already has one. Creating and parsing archive.vg browser urls has been moved to ArchiveVG class.
Syncing a game's cover with archive.vg also updates the game's archiveID and lastArchiveSync properties.
Refactored some archive syncing code and hooked up automatic syncing again.
Trying to import a rom that's already in the library does not crash anymore.
Archive sync continues when open emu starts.
Hooked up the Volume Up/Volume Down menu items
Added Show Game At Archive.vg item, fixes #505. Hide Display Duplicates
Align popover menu behavior with Finder right-click behavior
Revert "Align popover menu behavior with Finder right-click behavior"

There are a couple of issues that need to be resolved.

This reverts commit 4962bb697455e8670a8c35ea8738048f1b078e60.
Better try at the popover menu right-click behavior, fixes multiple popover menusappearing, getting stuck