Use matchMedia to check if mobile css is enabled instead of checking window innerwidth size.

Uses less javascript to update css style, rework buttons css for show/hide video and chat.
Fix show or hide video button on normal or mobile ui when windows is resized or when orientation change.

Thanks to gregfr.

Thanks to erdnaxe.

Users list bars is partially hidden which troncate some username on certains devices.

When Settings menu element height is more that the menu content height some item are hidden. overflow to scroll to make them visible on scroll

The maximum device with for mobile layout in css is 1024px, for device with > 768 (Ipad)
chat button will stay hidded while chat box is also hidden when there is a video call.
This commit fix the issue.

ErrTimeout was introduced in Go 1.15, while we support 1.13 and later.
Thanks to Michael Ströder for the report.

All clients implement Kick, no need for a separate interface.

We now notice that a TLS certificate on disk has changed, and we
generate a self-signed certificate if none is found.

Thanks to Yacine.