Bug 1406725 - Make the allTabs dropmarker stroke better visible. r=jorgk CLOSED TREE

mail/themes/shared/mail/icons/arrow-dropdown.svg

@@ -2,5 +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="16" height="16" viewBox="0 0 16 16">
-  <path fill="context-fill" fill-opacity="context-fill-opacity" d="M8 12a1 1 0 0 1-.7-.3l-5-5a1 1 0 0 1 1.4-1.4L8 9.6l4.3-4.3a1 1 0 0 1 1.4 1.4l-5 5a1 1 0 0 1-.7.3z"/>
+  <path fill="context-fill" fill-opacity="context-fill-opacity" d="M8 11.7c-.26 0-.5-.12-.7-.3l-5-5c-.68-.9.5-2.38 1.4-1.78L8 8.9l4.3-4.28c.9-.68 2.1.88 1.4 1.78l-5 5c-.2.2-.46.3-.7.3z"/>
 </svg>