ui-tree: add about link in tree view list

Signed-off-by: Christian Hesse <mail@eworm.de>

ui-tree.c

diff --git a/ui-tree.c b/ui-tree.c
index 5d7b257..635a2a4 100644
--- a/ui-tree.c
+++ b/ui-tree.c
@@ -270,6 +270,9 @@
 	if (!S_ISGITLINK(mode))
 		cgit_plain_link("plain", NULL, "button", ctx.qry.head,
 				walk_tree_ctx->curr_rev, fullpath.buf);
+	if (!S_ISDIR(mode))
+		cgit_about_link("about", NULL, "button", ctx.qry.head,
+				walk_tree_ctx->curr_rev, fullpath.buf);
 	if (!S_ISDIR(mode) && ctx.repo->enable_blame)
 		cgit_blame_link("blame", NULL, "button", ctx.qry.head,
 				walk_tree_ctx->curr_rev, fullpath.buf);