[patch] Use WordPress' gravatar settings

[DJPaul]

On BuddyPress' admin settings, we have an option to set the user gravatar default. We also use it for group and blog gravatars, even though we only describe the option as for users. WordPress has a similar option to control gravatars used on comments.

I think BuddyPress overlaps with the WordPress core in this case, and provides no additional benefit. I don't think adding more options to set default group and blog gravatars would be of much value. Most sites seem to use the same gravatar default throughout.

Patch attached to make this change, feedback appreciated.

[boonebgorges]

I like the idea of removing this redundant option, and thus I like this patch.

On the larger issue of default avatars, I think that it's a *good* idea to give more flexibility in terms of default avatars for different components (right now it's very difficult to do anything custom with avatars). But I don't necessarily think it should be an admin option - more like a filterable value. Probably worthy of a different enhancement ticket.

[DJPaul]

Before we commit this, we need to put code in the upgrader to migrate from the settings so that people's preference isn't reset.

[boonebgorges]

See #2697. Maybe my patch on #2697 should be updated to look at $bp->grav_default (why not get rid of the 'user' bit and just have the whole thing filterable in bp_core_fetch_avatar()?) - except it'd have to be an absolute filepath, so maybe we'd need a different $bp->avatar_default.

[djpaul]

(In [3443]) Use WordPress' gravatar settings. See #2712.

[DJPaul]

Ticket left open as a reminder to signpost this change when we update the admin pages.

[DJPaul]

Closing ticket as I'm sure I'll remember :)