Video-FRAME Gallery View

[sbatchelder]

A new gallery view that allows users to review a grid of video-media frames. This gallery should be filterable by media-attributes, Frame-state attributes and by Localization. Eg if a frame includes localizations the matches the query, or has an associated frame-level state associated with it that matches the frame-state query, include that media frame.
While I think this would be useful as a core feature, it may make sense for this feature to start off as a custom dashboard.