remoteAccess: Make indicator orange

Make the indicator for active remote access use the warning color, to
indicate the severity of allowing remote access.

This only makes the indicator icon orange; the icon in the system menu
is still white.

data/theme/gnome-shell-sass/_common.scss

@@ -824,6 +824,8 @@ StScrollBar {
 
   .screencast-indicator { color: $warning_color; }
 
+  .remote-access-indicator { color: $warning_color; }
+
   &.solid {
     background-color: black;
     /* transition from transparent to solid */

js/ui/status/remoteAccess.js

@@ -41,6 +41,7 @@ var RemoteAccessApplet = new Lang.Class({
 
         this._indicator = this._addIndicator();
         this._indicator.icon_name = 'screen-shared-symbolic';
+        this._indicator.add_style_class_name('remote-access-indicator');
         this._item =
             new PopupMenu.PopupSubMenuMenuItem(_("Screen is Being Shared"),
                                                true);