It seems this is a well known problem, unfortunately there is NO good solution for this, I've tried all the possible answeres for this but NOTHING works even after the update to framework 2.1.9. I've tried the following solutions:
1. I made the change in the index.php file in the admin template ISIS to add the following code: JHtml: :_('behavior.framework', true);
2. I removed line 143 'return false' in the plugin/system/helix/js/admin/layout.admin.js file
3. I changed line 143 from 'return false' into 'return true'
4. I cleared cache all the time and also from the browsers
NOTHING helps and I cannot change the template anymore, PLEASE help me to find the right and good solution for this problem!!!