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.

Thanks to mscherer for the report.

We no longer risk deadlocking when sending actions, which in turn
enables pushing connections synchronously.

Doing this asynchronously was racy -- under extreme circumstances, a
client could be deleted before it was added.

If the writer gets congested, the whole group might be delayed.  Better
to drop the slow client in that case.

This simply indicates that the server closed the connection
before we received the close indication from the client.

Don't allow a user with a wildcard password entry to use the same
username as a user with a specific entry even at the same privilege
level.

A stat of a cached file is cheap, no need to micro-optimise.