[FIX] web: prevent focus issue with autoresize

The copied textarea used in autoresize was a valid target for focus when
using the tab key.  This is a major issue in editable list views,
because when the user leaves a textarea, the list view jumps up, with no
visible focused field.

addons/web/static/src/js/framework/utils.js

@@ -468,7 +468,7 @@ function autoresize ($textarea, options) {
     var $fixed_text_area;
     var min_height = (options && options.min_height) || 50;
     if (!$fixed_text_area) {
-        $fixed_text_area = $('<textarea>').css({
+        $fixed_text_area = $('<textarea disabled>').css({
             position: 'absolute',
             opacity: 0,
             height: 10,