Description:

If you resize the window, at some point the "Create new channel" UI disappears below the sidebar. I think the width of the sidebar is not taken into account, as at some point the disappearance of the sidebar (in favour of "the burger menu") still triggers. See the GIF below for further details.

This happens on Firefox 58.0.2 as well as Chromium 64.0.3282.167.

Server Setup Information:

Version of Rocket.Chat Server: 0.62.0
Operating System: Oracle Linux 7
Deployment Method(snap/docker/tar/etc): tar
Number of Running Instances: 1
DB Replicaset Oplog: -
Node Version: 8.9.4
mongoDB Version: 2.6.12

Steps to Reproduce:

1. Resize width of window
2. Watch dialogue disappear "below" sidebar menu
3. See GIF below for details

Expected behavior:

• Sidebar retraction should trigger earlier when resizing, so the dialogue stays visible

Actual behavior:

• Dialogue disappears "below" sidebar menu

Relevant logs: