[OzzModz] Avatar Gallery

[OzzModz] Avatar Gallery 2.0.2 Patch Level 3

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Fix: Avatar from the gallery is not reset when uploading new custom avatar
Fix: remove XF 2.2+ template tag

PS: This will be the last version that supports XF 2.1.x
- Added style properties to make avatar or/and category container scrollable
- Added search filter in ACP avatar list
- Avatar categories now collapsible
- Category container now can be clipped with scrollbar
- Added avatar data export
- Added checkboxes in ACP avatar list for batch actions (delete/export)
- Fixed incorrect relation condition column in AvatarCategory entity
- Fix: display ungrouped avatars in ACP avatar list (are not deleted when deleting a category and were not displayed anywhere)