Ugly Hacky Fix: Clear Loc/Rot/Scale + Autokey now works for bones

This is a hacky fix so that animators can use this tool again with autokey enabled
(which they do all the time). The issue here is that the tool writes the new (0)
values to the original data, but insertkey now reads from evaluated data (so that
keying interpolated values works). However, the cleared values do not get re-evaluated
or flushed before insertkey gets to it (via auto keying), meaning that the wrong values
get keyed.

There may be better solutions for this, but for now, this is the simplest fix that
I can get working.

source/blender/editors/armature/pose_transform.c

@@ -780,6 +780,7 @@ static int pose_clear_transform_generic_exec(bContext *C, wmOperator *op,
 	ViewLayer *view_layer = CTX_data_view_layer(C);
 	FOREACH_OBJECT_IN_MODE_BEGIN (view_layer, OB_MODE_POSE, ob_iter)
 	{
+		Object *ob_eval = DEG_get_evaluated_object(CTX_data_depsgraph(C), ob_iter); // XXX: UGLY HACK (for autokey + clear transforms)
 		ListBase dsources = {NULL, NULL};
 		bool changed = false;
 
@@ -797,6 +798,11 @@ static int pose_clear_transform_generic_exec(bContext *C, wmOperator *op,
 				}
 				/* tag for autokeying later */
 				ANIM_relative_keyingset_add_source(&dsources, &ob_iter->id, &RNA_PoseBone, pchan);
+				
+#if 1			/* XXX: Ugly Hack - Run clearing function on evaluated copy of pchan */
+				bPoseChannel *pchan_eval = BKE_pose_channel_find_name(ob_eval->pose, pchan->name);
+				clear_func(pchan_eval);
+#endif
 			}
 			else {
 				/* add unkeyed tags */