[gnome-shell] js/main: Use warning log level for notifyError

[Marge Bot <marge-bot src gnome org>]

commit 71765a10566df07502f7fcb781b554298860fb77
Author: Marco Trevisan (Treviño) <mail 3v1n0 net>
Date:   Mon Sep 2 16:44:37 2019 +0200

    js/main: Use warning log level for notifyError
    
    Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/697>

 js/ui/main.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/js/ui/main.js b/js/ui/main.js
index d1a2076f66..d1f791a909 100644
--- a/js/ui/main.js
+++ b/js/ui/main.js
@@ -504,9 +504,9 @@ function notify(msg, details) {
 function notifyError(msg, details) {
     // Also print to stderr so it's logged somewhere
     if (details)
-        log(`error: ${msg}: ${details}`);
+        console.warn(`error: ${msg}: ${details}`);
     else
-        log(`error: ${msg}`);
+        console.warn(`error: ${msg}`);
 
     notify(msg, details);
 }