Make settings menu clickable again in Firefox 46.0a2

Fixes #2286. Thanks to @juhakujala for tracking down the fix, and @akx for passing it on!

CHANGELOG.txt

@@ -46,6 +46,7 @@ Changelog
  * Fix: Fixed a bug preventing pages with a OneToOneField from being copied (Liam Brenner)
  * Fix: SASS compilation errors during Wagtail development no longer cause exit of Gulp process, instead throws error to console and continues (Thomas Winter)
  * Fix: Explorer page listing now uses specific page models, so that custom URL schemes defined on Page subclasses are respected
+ * Fix: Made settings menu clickable again in Firefox 46.0a2 (Juha Kujala)
 
 1.3.1 (05.01.2016)
 ~~~~~~~~~~~~~~~~~~

CONTRIBUTORS.rst

@@ -113,6 +113,7 @@ Contributors
 * Nicolas Kuttler
 * Mike Dingjan
 * Loic Teixeira
+* Juha Kujala
 
 Translators
 ===========

docs/releases/1.4.rst

@@ -89,7 +89,8 @@ Bug fixes
  * StreamBlock HTML rendering now handles non-ASCII characters correctly on Python 2 (Mikalai Radchuk)
  * Fixed a bug preventing pages with a ``OneToOneField`` from being copied (Liam Brenner)
  * SASS compilation errors during Wagtail development no longer cause exit of Gulp process, instead throws error to console and continues (Thomas Winter)
- * Fix: Explorer page listing now uses specific page models, so that custom URL schemes defined on Page subclasses are respected
+ * Explorer page listing now uses specific page models, so that custom URL schemes defined on Page subclasses are respected
+ * Made settings menu clickable again in Firefox 46.0a2 (Juha Kujala)
 
 
 Upgrade considerations

wagtail/wagtailadmin/static_src/wagtailadmin/scss/core.scss

@@ -443,10 +443,6 @@ footer,
 
     // Z-indexes
     .nav-main {
-        li {
-            z-index: 1;
-        }
-
         .footer {
             z-index: 2;
         }