Re: Sponsor development of the key motion.

Use this patch:
diff --git a/src/document/renderer.c b/src/document/renderer.c
index 90fcc80..8b80d73 100644
--- a/src/document/renderer.c
+++ b/src/document/renderer.c
@@ -499,6 +499,7 @@ render_document_frames(struct session *ses, int no_cache)
 	}
 }
 
+#if 0
 static int
 comp_links(struct link *l1, struct link *l2)
 {
@@ -506,6 +507,20 @@ comp_links(struct link *l1, struct link *l2)
 	if_assert_failed return 0;
 	return (l1->number - l2->number);
 }
+#endif
+
+static int
+comp_links(struct link *l1, struct link *l2)
+{
+	int res;
+
+	assert(l1 && l2 && l1->points && l2->points);
+	if_assert_failed return 0;
+	res = l1->points[0].y - l2->points[0].y;
+	if (res)
+		return res;
+	return l1->points[0].x - l2->points[0].x;	
+}
 
 void
 sort_links(struct document *document)


and these keybindings:

bind "main" "up" = "move-link-up"
bind "main" "down" = "move-link-down"
bind "main" "left" = "move-link-prev"
bind "main" "right" = "move-link-next"

You pay 5$ :)