Revert "Allow help pager to clear screen on exit"
Revert "Allow help pager to clear screen on exit"

This reverts commit 5a94221027e8c83a08ee15ff03f21ab74e288f1d.

Removing "X" from `less` configuration did help to clear the screen on
exit, but also led to paginated output being swallowed up when the
output was less than one page (i.e. one line). I have no idea what
actually happens, but it's important to bring back full output.

I couldn't find a way to have paginated output cleared on exit at the
same time as having single-page output normally.

Fixes #520, reopens #368

jpkrohling/hub,naru0504/hub,aspiers/hub,naru0504/hub,pwaller/hub,jpkrohling/hub,pcorpet/hub,pcorpet/hub,AndBicScadMedia/hub,adjohnson916/hub,boris-rea/hub,boris-rea/hub,haikyuu/hub,hb9kns/hub,rlugojr/hub,pwaller/hub,boris-rea/hub,github/hub,cpick/hub,naru0504/hub,sideci-sample/sideci-sample-hub,ASidlinskiy/hub,ryo33/hub,isundaylee/hub,xantage/hub,hopil/hub,terry2000/hub,tomasv/hub,isundaylee/hub,jingweno/hub,tomasv/hub,Gusto/hub,dev4mobile/hub,dev4mobile/hub,ASidlinskiy/hub,rlugojr/hub,elancom/hub,sbp/hub,aereal/hub,github/hub,AndBicScadMedia/hub,ZenPayroll/hub,whilp/hub,aspiers/hub,github/hub,isundaylee/hub,Gusto/hub,whilp/hub,whilp/hub,nmfzone/hub,dongjoon-hyun/hub,aspiers/hub,codydaig/hub,ryo33/hub,nmfzone/hub,nlutsenko/hub,cpick/hub,codydaig/hub,SanCoder-Q/hub,pcorpet/hub,elancom/hub,xantage/hub,terry2000/hub,hopil/hub,xantage/hub,pwaller/hub,ryo33/hub,haikyuu/hub,RichardLitt/hub,ZenPayroll/hub,jpkrohling/hub,nmfzone/hub,pankona/hub,tomasv/hub,aereal/hub,hb9kns/hub,codydaig/hub,nlutsenko/hub,nlutsenko/hub,pankona/hub,haikyuu/hub,terry2000/hub,jingweno/hub,cpick/hub,ASidlinskiy/hub,github/hub,sbp/hub,RichardLitt/hub,hopil/hub,AndBicScadMedia/hub,pankona/hub,hb9kns/hub,RichardLitt/hub,SanCoder-Q/hub,adjohnson916/hub,jingweno/hub,aereal/hub,dev4mobile/hub,dongjoon-hyun/hub,SanCoder-Q/hub,elancom/hub,sbp/hub,dongjoon-hyun/hub,adjohnson916/hub,rlugojr/hub,sideci-sample/sideci-sample-hub