Before this commit, the social media popover (used in forum but
available everywhere) may break over multiple rows if used on a relative
positioned small button. This however never occurred in standard <= 12.0
so we will consider this not a bug fix. This will however occur with
the upcoming forum refactoring, so we needed a fix for master.
This commit forces the social icons on one row and take the opportunity
to refactor the template to make a simpler and more beautiful popover
by using conventional icons and social media own colors.
closesodoo/odoo#29327