[yelp-xsl] Hide sidebar by default at 720px

[Shaun McCance <shaunm src gnome org>]

commit e141af8348f67d5b46fcb383769e4e10a2435d79
Author: Shaun McCance <shaunm redhat com>
Date:   Tue Dec 29 11:05:54 2020 -0500

    Hide sidebar by default at 720px

 xslt/common/css/core.css.tmpl | 5 +++++
 1 file changed, 5 insertions(+)
---
diff --git a/xslt/common/css/core.css.tmpl b/xslt/common/css/core.css.tmpl
index daede214..9a0c4108 100644
--- a/xslt/common/css/core.css.tmpl
+++ b/xslt/common/css/core.css.tmpl
@@ -42,6 +42,11 @@ aside.sidebar {
   padding: 20px 10px;
   background: {{$color.bg.gray}}
 }
+@media only screen and (max-width: 720px) {
+  aside.sidebar {
+    display: none;
+  }
+}
 aside.sidebar-right { order: 3; }
 aside.sidebar section { margin-top: 0; }
 aside.sidebar * { margin-bottom: 20px; }