In this commit two errors in the rendering of the mega menu are fixed:
* the position of the mega menu when the option `Sub Menus` is `On Hover`
this bug is due that we show the mega menu manually adding the `show`
class on the element in our code. However, in the `On Click` mode,
it's Bootstrap's javascript that handle the show/hide state.
Bootstrap adds the `show` class and also adds the attribute
`data-bs-popper="none"` to the element. In `On Hover` mode this
attribute was missing.
* the render of mega menu in the `+ icon` (`o_extra_menu_items`).
This error occurs because in Bootstrap 5 the width is set with the
`width` property and in Boostrap 4 it was `max-width`. In Odoo
`col-XX-YY` CSS rules are overridden when the mega menu is in the
`+ icon`, but the `max-width` was not changed by `width` during the
Bootstrap 5 migration.
closesodoo/odoo#100068
Signed-off-by: Adrien Dieudonné (adr) <adr@odoo.com>