Multisite: Use the admin-multisite Dashicon in the admin menu and bar

This icon was added to Dashicons in 4.3, but not applied to anything in our CSS.

Props Ipstenu.
Fixes #36754.


git-svn-id: https://develop.svn.wordpress.org/trunk@37362 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/css/admin-menu.css

@@ -97,7 +97,7 @@
 }
 
 .icon16.icon-site:before {
-	content: "\f112";
+	content: "\f541";
 }
 
 .icon16.icon-generic:before {

src/wp-includes/css/admin-bar.css

@@ -527,7 +527,7 @@ html:lang(he-il) .rtl #wpadminbar *  {
 
 #wpadminbar #wp-admin-bar-my-sites > .ab-item:before,
 #wpadminbar #wp-admin-bar-site-name > .ab-item:before {
-	content: "\f112";
+	content: "\f541";
 	top: 2px;
 }
 

src/wp-includes/css/dashicons.css

@@ -78,7 +78,7 @@
 }
 
 .dashicons-admin-network:before {
-	content: "\f112";
+	content: "\f541";
 }
 
 .dashicons-admin-generic:before {