patch from mmistakes/minimal-mistakes to fix jitter

Author: staeiou

_sass/_sidebar.scss

@@ -7,20 +7,24 @@
    ========================================================================== */
 
 .sidebar {
+  -webkit-transform: translate3d(0, 0 , 0);
+          transform: translate3d(0, 0 , 0);
+
   @include clearfix();
   margin-bottom: 1em;
 
   @include breakpoint($large) {
     @include span(2 of 12);
     opacity: 0.75;
     -webkit-transition: opacity 0.2s ease-in-out;
-    transition: opacity 0.2s ease-in-out;
+            transition: opacity 0.2s ease-in-out;
 
     &:hover {
       opacity: 1;
     }
   }
 
+
   @include breakpoint($x-large) {
     padding-right: 0;
   }
@@ -229,4 +233,4 @@
       text-decoration: underline;
     }
   }
-}
+}