Website content is not supposed to use flex as it is not supported by
some old browsers. This commit provides a way to use flex only for
browsers which support it. When designing a snippet, you can use flex
to design elements and then write other style for when flex is not
supported.
Using flex should however still be avoided when possible. But hopefully,
this commit will allow to build greater snippets whose ugly non-flex
style can be disabled on demand or dropped in a future odoo version.
qsm-odoo
f8285ef439