media.css: Make compose box not collapse to two lines.
media.css: Make compose box not collapse to two lines.

This makes the compose box not collapse to two lines by making input
fields smaller.

Fixes: #6366.

Galexrt/zulip,showell/zulip,zulip/zulip,rishig/zulip,mahim97/zulip,brainwane/zulip,tommyip/zulip,tommyip/zulip,shubhamdhama/zulip,jackrzhang/zulip,kou/zulip,jackrzhang/zulip,brockwhittaker/zulip,mahim97/zulip,shubhamdhama/zulip,brockwhittaker/zulip,synicalsyntax/zulip,Galexrt/zulip,brockwhittaker/zulip,timabbott/zulip,dhcrzf/zulip,eeshangarg/zulip,tommyip/zulip,dhcrzf/zulip,rht/zulip,dhcrzf/zulip,timabbott/zulip,brainwane/zulip,brockwhittaker/zulip,dhcrzf/zulip,showell/zulip,rishig/zulip,eeshangarg/zulip,kou/zulip,mahim97/zulip,Galexrt/zulip,andersk/zulip,jackrzhang/zulip,Galexrt/zulip,synicalsyntax/zulip,hackerkid/zulip,zulip/zulip,hackerkid/zulip,tommyip/zulip,timabbott/zulip,andersk/zulip,synicalsyntax/zulip,Galexrt/zulip,andersk/zulip,zulip/zulip,rht/zulip,rht/zulip,punchagan/zulip,brainwane/zulip,hackerkid/zulip,rht/zulip,synicalsyntax/zulip,kou/zulip,mahim97/zulip,brainwane/zulip,timabbott/zulip,dhcrzf/zulip,jackrzhang/zulip,tommyip/zulip,rht/zulip,dhcrzf/zulip,rht/zulip,showell/zulip,shubhamdhama/zulip,zulip/zulip,hackerkid/zulip,showell/zulip,shubhamdhama/zulip,eeshangarg/zulip,jackrzhang/zulip,tommyip/zulip,zulip/zulip,kou/zulip,rishig/zulip,eeshangarg/zulip,showell/zulip,zulip/zulip,eeshangarg/zulip,rishig/zulip,shubhamdhama/zulip,synicalsyntax/zulip,eeshangarg/zulip,rht/zulip,brockwhittaker/zulip,brainwane/zulip,jackrzhang/zulip,brockwhittaker/zulip,zulip/zulip,jackrzhang/zulip,punchagan/zulip,andersk/zulip,brainwane/zulip,punchagan/zulip,shubhamdhama/zulip,timabbott/zulip,punchagan/zulip,kou/zulip,kou/zulip,Galexrt/zulip,hackerkid/zulip,mahim97/zulip,synicalsyntax/zulip,showell/zulip,andersk/zulip,rishig/zulip,punchagan/zulip,rishig/zulip,punchagan/zulip,timabbott/zulip,timabbott/zulip,eeshangarg/zulip,rishig/zulip,synicalsyntax/zulip,brainwane/zulip,mahim97/zulip,Galexrt/zulip,andersk/zulip,shubhamdhama/zulip,hackerkid/zulip,andersk/zulip,hackerkid/zulip,dhcrzf/zulip,tommyip/zulip,kou/zulip,showell/zulip,punchagan/zulip