css: Remove buggy stream settings media CSS for narrow windows.
css: Remove buggy stream settings media CSS for narrow windows.

This caused weird behavior in the relevant band of window widths, and
removing it works considerably better.

There's still bad behavior in handling situations where the stream
name is too long and thus this wraps, but we should address that
as a follow-up.

brainwane/zulip,timabbott/zulip,shubhamdhama/zulip,hackerkid/zulip,andersk/zulip,hackerkid/zulip,eeshangarg/zulip,eeshangarg/zulip,showell/zulip,rht/zulip,punchagan/zulip,kou/zulip,punchagan/zulip,eeshangarg/zulip,showell/zulip,zulip/zulip,andersk/zulip,rht/zulip,zulip/zulip,timabbott/zulip,timabbott/zulip,brainwane/zulip,rht/zulip,showell/zulip,shubhamdhama/zulip,andersk/zulip,punchagan/zulip,showell/zulip,andersk/zulip,rht/zulip,hackerkid/zulip,synicalsyntax/zulip,zulip/zulip,shubhamdhama/zulip,rht/zulip,kou/zulip,hackerkid/zulip,shubhamdhama/zulip,brainwane/zulip,synicalsyntax/zulip,andersk/zulip,hackerkid/zulip,timabbott/zulip,shubhamdhama/zulip,punchagan/zulip,eeshangarg/zulip,zulip/zulip,kou/zulip,shubhamdhama/zulip,showell/zulip,punchagan/zulip,zulip/zulip,showell/zulip,shubhamdhama/zulip,rht/zulip,punchagan/zulip,andersk/zulip,brainwane/zulip,zulip/zulip,eeshangarg/zulip,hackerkid/zulip,brainwane/zulip,kou/zulip,punchagan/zulip,synicalsyntax/zulip,kou/zulip,hackerkid/zulip,timabbott/zulip,showell/zulip,synicalsyntax/zulip,brainwane/zulip,eeshangarg/zulip,timabbott/zulip,zulip/zulip,kou/zulip,synicalsyntax/zulip,andersk/zulip,rht/zulip,brainwane/zulip,timabbott/zulip,synicalsyntax/zulip,eeshangarg/zulip,synicalsyntax/zulip,kou/zulip