HVIF Icon Oddities

[RandomInsano]

Was checking out the new icons submitted recently. Seems there are a few issues with HVIF icons in general, or at least their use in the OS:

1. HVIF mime type needed (if that's not regulated by some higher governing body)
2. Have the scrapers properly identify straight HVIF icons as images
3. Allow file icons to be set using the filetype preflet.
4. Allow icons to be set from an icon file
5. Make dragging and dropping in the filetype preflet work. Seems the target is droppable.

There may be underlying reasons why some of this hasn't been done. maybe I misunderstand the use of the mime type preflet. If that's the case, maybe we need to think about how to make the preflet's use clearer for end users.

[stippi]

Just as additional info: Icon-O-Matic will install the icon mime type properly, most of the above issues go away then, i.e. double clicking icons works then. Drag and drop is already supposed to work, but I haven't used it in a while.

[axeld]

Choosing FileTypes as component for this for now. I guess most of the problem is how to deal with icon files.

[scottmc]

Item 5 is a dupe of #1868, which is supposed to work as that's how it worked in BeOS hrev5.