Before [1], the web_editor module was auto installed. After that commit,
the bus module has been added to the web_editor dependencies. Since
the bus module is not auto installed, the web_editor module dependencies
are not met which means the login colors are wrong (blue instead of green).
This commit fixes this error by adding the `auto_install` flag to the
bus module.
[1]: odoo@a5623d24b77f523aeeafbb8c2bfaf27241ef3c8e
closesodoo/odoo#100212
Signed-off-by: Adrien Dieudonné (adr) <adr@odoo.com>