[FIX] mail: fix scroll in discuss on small screens

When using the Discuss app (not the systray's thread window) on a small
device, it is not possible to scroll through the discussion (cf. tab
"Chat" or "Channels").

Steps to reproduce:
* Go in discuss (in mobile)
* Go to tab chat or channel => BUG
NB: you must have enough element to test the scroll

This bug is due to the commit odoo/odoo@3ad77065605459140c70c2f5ffadceed92e417ca.

Before it, the styles as interpreted by the browser looked like this:

    .o_mail_discuss_tab_pane {
        overflow-x:scroll; // explicitly set in discuss.scss
        overflow-y:auto;   // implicit ; due to the overflow-x rule
    }

But by removing the overflow-x rule, the styles ware interpreted as:

    .o_mail_discuss_tab_pane {
        overflow-x:visible;   // implicit ; due to the absence of overflow-* rule
        overflow-y:visible;   // implicit ; due to the absence of overflow-* rule
    }

In addition, the parent element had an overflow: auto rule scoped only
for desktop-like screens.

This commit fixes this issue by unscoping the overflow: auto rule on the
parent, allowing to scroll the messages' list in both desktop-like and
mobile-like screens.

Reference:
https://developer.mozilla.org/en-US/docs/Web/CSS/overflow-x

closes odoo/odoo#45964

X-original-commit: f4b22af7ed28d3515d77bfd76691aba1129581b1
Signed-off-by: Pierre Paridans <pparidans@users.noreply.github.com>

0 files changed, 0 insertions, 0 deletions