Fix duplicated DOM id 'main_div' in Dashboard editing.
Fix duplicated DOM id 'main_div' in Dashboard editing.

The content of the partial is places inside #main_div. So it should not
contain a #main_div.
(transferred from ManageIQ/manageiq@b22947d13efd93b1015da6cc7fecac1ee00fa059)

ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic