autofocus on code entry

rest/templates/form-open.tpl

@@ -44,6 +44,7 @@ button[type=submit] {
           title="Base32 Code: Any of letters A-Z (excluding U) or digits 0-9.

Note: O 0 and i I l L 1 can be used interchangeably"
           size="5"
           style="margin: 0.1em 0 0.3em"
+          autofocus="true"
         ></input>
         <br/>
         <button class="button-resize pure-button" type="submit" form="{{tool}}-open"> Open </button>