Fix manage button display issue in RTL (fixes #2394)

static/css/impala/buttons.less

@@ -162,7 +162,6 @@ button.bad, .button.bad, .button.developer, .button.scary { // Red
             span {
                 margin: 0 -4px 0 0;
                 padding: 0 24px 0 0;
-                .sprite-pos-right(6, 64, 3px);
             }
         }
     }

static/css/restyle/restyle.less

@@ -942,6 +942,10 @@ input:not(.upvotes):not(.downvotes)[type="submit"],
     background: #bc2b1a;
     span {
       background-position: 0 -383px;
+
+      .html-rtl & {
+        .sprite-pos-right(6, 64, 3px);
+      }
     }
   }