analytics: Add section comments in counts.count_stats_.
analytics: Add section comments in counts.count_stats_.

Also reorders the stats a bit.

brainwane/zulip,timabbott/zulip,vaidap/zulip,mahim97/zulip,brockwhittaker/zulip,tommyip/zulip,kou/zulip,kou/zulip,hackerkid/zulip,andersk/zulip,amanharitsh123/zulip,synicalsyntax/zulip,andersk/zulip,showell/zulip,SmartPeople/zulip,tommyip/zulip,andersk/zulip,hackerkid/zulip,timabbott/zulip,j831/zulip,punchagan/zulip,synicalsyntax/zulip,christi3k/zulip,Galexrt/zulip,synicalsyntax/zulip,ryanbackman/zulip,brockwhittaker/zulip,jphilipsen05/zulip,mahim97/zulip,rht/zulip,synicalsyntax/zulip,dhcrzf/zulip,punchagan/zulip,dhcrzf/zulip,hackerkid/zulip,rishig/zulip,brainwane/zulip,eeshangarg/zulip,vaidap/zulip,zulip/zulip,jackrzhang/zulip,verma-varsha/zulip,Galexrt/zulip,showell/zulip,mahim97/zulip,rht/zulip,Galexrt/zulip,timabbott/zulip,tommyip/zulip,synicalsyntax/zulip,punchagan/zulip,SmartPeople/zulip,vaidap/zulip,rishig/zulip,rishig/zulip,christi3k/zulip,j831/zulip,kou/zulip,ryanbackman/zulip,christi3k/zulip,showell/zulip,tommyip/zulip,rishig/zulip,SmartPeople/zulip,showell/zulip,mahim97/zulip,j831/zulip,Galexrt/zulip,kou/zulip,verma-varsha/zulip,verma-varsha/zulip,zulip/zulip,christi3k/zulip,verma-varsha/zulip,brockwhittaker/zulip,hackerkid/zulip,verma-varsha/zulip,amanharitsh123/zulip,vaidap/zulip,tommyip/zulip,brainwane/zulip,brainwane/zulip,timabbott/zulip,shubhamdhama/zulip,hackerkid/zulip,jrowan/zulip,timabbott/zulip,showell/zulip,shubhamdhama/zulip,Galexrt/zulip,ryanbackman/zulip,eeshangarg/zulip,timabbott/zulip,jackrzhang/zulip,amanharitsh123/zulip,jackrzhang/zulip,brockwhittaker/zulip,jphilipsen05/zulip,jackrzhang/zulip,vabs22/zulip,andersk/zulip,andersk/zulip,hackerkid/zulip,andersk/zulip,brockwhittaker/zulip,eeshangarg/zulip,shubhamdhama/zulip,jphilipsen05/zulip,rht/zulip,tommyip/zulip,timabbott/zulip,j831/zulip,amanharitsh123/zulip,vabs22/zulip,brainwane/zulip,brainwane/zulip,shubhamdhama/zulip,christi3k/zulip,rishig/zulip,jackrzhang/zulip,jphilipsen05/zulip,zulip/zulip,shubhamdhama/zulip,jrowan/zulip,Galexrt/zulip,mahim97/zulip,punchagan/zulip,showell/zulip,mahim97/zulip,kou/zulip,shubhamdhama/zulip,rht/zulip,synicalsyntax/zulip,brockwhittaker/zulip,Galexrt/zulip,SmartPeople/zulip,dhcrzf/zulip,rishig/zulip,j831/zulip,jrowan/zulip,shubhamdhama/zulip,tommyip/zulip,rishig/zulip,amanharitsh123/zulip,zulip/zulip,jphilipsen05/zulip,SmartPeople/zulip,ryanbackman/zulip,vaidap/zulip,jackrzhang/zulip,dhcrzf/zulip,zulip/zulip,verma-varsha/zulip,vaidap/zulip,showell/zulip,eeshangarg/zulip,eeshangarg/zulip,zulip/zulip,amanharitsh123/zulip,vabs22/zulip,SmartPeople/zulip,ryanbackman/zulip,vabs22/zulip,eeshangarg/zulip,punchagan/zulip,jackrzhang/zulip,ryanbackman/zulip,j831/zulip,jrowan/zulip,jrowan/zulip,punchagan/zulip,dhcrzf/zulip,rht/zulip,brainwane/zulip,dhcrzf/zulip,hackerkid/zulip,jphilipsen05/zulip,kou/zulip,vabs22/zulip,zulip/zulip,eeshangarg/zulip,rht/zulip,punchagan/zulip,synicalsyntax/zulip,jrowan/zulip,andersk/zulip,rht/zulip,kou/zulip,vabs22/zulip,christi3k/zulip,dhcrzf/zulip