Bug 1137129 - Fix the toggle-all-animations button size on retina screens; r=miker

--HG--
extra : rebase_source : cdd3dcbfc9d528ed72820b4fa60e6b88a433aeae

browser/themes/shared/devtools/animationinspector.css

@@ -85,8 +85,7 @@ body {
 }
 
 @media (min-resolution: 2dppx) {
-  #element-picker::before,
-  #toggle-all::before {
+  #element-picker::before {
     background-image: url("chrome://browser/skin/devtools/command-pick@2x.png");
     background-size: 64px;
   }