Merge pull request #13818 from edx/alisan/submit-button-RTL

submit button in RTL

common/lib/xmodule/xmodule/css/capa/display.scss

@@ -968,7 +968,7 @@ div.problem .action {
     }
     .submit {
       @include margin-right($baseline / 2);
-      float: left;
+      @include float(left);
     }
   }