🚚 Use global.css instead of global-shared.css in interstitials

Author: kierandrewett

components/interstitials/content/interstitials.css

@@ -2,7 +2,7 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-@import url("chrome://dot/skin/global-shared.css");
+@import url("chrome://dot/skin/global.css");
 @import url("chrome://dot/content/widgets/browser-icon.css");
 
 html,