Bug 1499279 - Fix the Connection icon in the Control Centre in the gray state which we display in cases such as mixed content blocking r=johannh

Differential Revision: https://phabricator.services.mozilla.com/D9320

--HG--
extra : moz-landing-system : lando

browser/themes/shared/controlcenter/connection.svg

@@ -2,6 +2,5 @@
    - 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/. -->
 <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="context-fill" fill-opacity="context-fill-opacity">
-  <path d="M12 0a6 6 0 0 0-6 6v5.29a6 6 0 0 0 12 0V6a6 6 0 0 0-6-6zm4 12.25A3.75 3.75 0 0 1 12.25 16h-.5A3.75 3.75 0 0 1 8 12.25v-6.5A3.75 3.75 0 0 1 11.75 2h.5A3.75 3.75 0 0 1 16 5.75z"/>
-  <rect x="3" y="10" width="18" height="13" rx="2" ry="2"/>
+  <path d="M19 10h-1V6A6 6 0 0 0 6 6v4H5a2 2 0 0 0-2 2v9a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-9a2 2 0 0 0-2-2zM8 5.75A3.75 3.75 0 0 1 11.75 2h.5A3.75 3.75 0 0 1 16 5.75V10H8z"/>
 </svg>