/help/: Restyle headers.
/help/: Restyle headers.

This restyles the headers to make the <h1> more prominent with a line
break below it, and the <h2> to be less prominent with smaller text and
pushed closer to the <p> tags.

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