Extract encode_operand/decode_operand in hashchange.js.
Extract encode_operand/decode_operand in hashchange.js.

These are just one-liners for now, but they will set us up
to do different encodings for different narrows.

eeshangarg/zulip,sonali0901/zulip,j831/zulip,timabbott/zulip,punchagan/zulip,samatdav/zulip,Diptanshu8/zulip,PhilSk/zulip,kou/zulip,amanharitsh123/zulip,rht/zulip,eeshangarg/zulip,vaidap/zulip,showell/zulip,samatdav/zulip,andersk/zulip,dawran6/zulip,synicalsyntax/zulip,aakash-cr7/zulip,kou/zulip,dhcrzf/zulip,tommyip/zulip,susansls/zulip,isht3/zulip,showell/zulip,amyliu345/zulip,Galexrt/zulip,synicalsyntax/zulip,sonali0901/zulip,brockwhittaker/zulip,jackrzhang/zulip,rht/zulip,jainayush975/zulip,christi3k/zulip,souravbadami/zulip,shubhamdhama/zulip,amyliu345/zulip,tommyip/zulip,vabs22/zulip,jainayush975/zulip,mahim97/zulip,vabs22/zulip,showell/zulip,andersk/zulip,souravbadami/zulip,punchagan/zulip,kou/zulip,blaze225/zulip,isht3/zulip,ryanbackman/zulip,SmartPeople/zulip,shubhamdhama/zulip,JPJPJPOPOP/zulip,ryanbackman/zulip,susansls/zulip,mahim97/zulip,samatdav/zulip,hackerkid/zulip,jackrzhang/zulip,sonali0901/zulip,showell/zulip,synicalsyntax/zulip,jackrzhang/zulip,eeshangarg/zulip,amanharitsh123/zulip,punchagan/zulip,vabs22/zulip,ryanbackman/zulip,susansls/zulip,hackerkid/zulip,dawran6/zulip,brainwane/zulip,kou/zulip,synicalsyntax/zulip,shubhamdhama/zulip,blaze225/zulip,sharmaeklavya2/zulip,dawran6/zulip,dhcrzf/zulip,j831/zulip,vaidap/zulip,dawran6/zulip,brockwhittaker/zulip,souravbadami/zulip,rht/zulip,Diptanshu8/zulip,christi3k/zulip,mahim97/zulip,verma-varsha/zulip,shubhamdhama/zulip,zulip/zulip,eeshangarg/zulip,ryanbackman/zulip,j831/zulip,vaidap/zulip,SmartPeople/zulip,brainwane/zulip,JPJPJPOPOP/zulip,dhcrzf/zulip,amyliu345/zulip,timabbott/zulip,dattatreya303/zulip,brainwane/zulip,andersk/zulip,Galexrt/zulip,SmartPeople/zulip,Diptanshu8/zulip,Galexrt/zulip,timabbott/zulip,vabs22/zulip,tommyip/zulip,andersk/zulip,synicalsyntax/zulip,SmartPeople/zulip,jainayush975/zulip,verma-varsha/zulip,tommyip/zulip,zulip/zulip,kou/zulip,dawran6/zulip,verma-varsha/zulip,shubhamdhama/zulip,christi3k/zulip,punchagan/zulip,ryanbackman/zulip,rishig/zulip,showell/zulip,PhilSk/zulip,souravbadami/zulip,rht/zulip,jrowan/zulip,showell/zulip,dattatreya303/zulip,christi3k/zulip,vabs22/zulip,hackerkid/zulip,aakash-cr7/zulip,JPJPJPOPOP/zulip,mahim97/zulip,sharmaeklavya2/zulip,jrowan/zulip,aakash-cr7/zulip,Galexrt/zulip,kou/zulip,JPJPJPOPOP/zulip,vaidap/zulip,andersk/zulip,PhilSk/zulip,jainayush975/zulip,Galexrt/zulip,rht/zulip,jphilipsen05/zulip,jphilipsen05/zulip,amanharitsh123/zulip,aakash-cr7/zulip,brockwhittaker/zulip,Diptanshu8/zulip,PhilSk/zulip,blaze225/zulip,sonali0901/zulip,ryanbackman/zulip,jackrzhang/zulip,verma-varsha/zulip,showell/zulip,jackrzhang/zulip,punchagan/zulip,eeshangarg/zulip,vaidap/zulip,jphilipsen05/zulip,brainwane/zulip,Galexrt/zulip,shubhamdhama/zulip,j831/zulip,andersk/zulip,souravbadami/zulip,isht3/zulip,sharmaeklavya2/zulip,susansls/zulip,mahim97/zulip,brainwane/zulip,sharmaeklavya2/zulip,amanharitsh123/zulip,aakash-cr7/zulip,jackrzhang/zulip,sonali0901/zulip,hackerkid/zulip,rishig/zulip,sharmaeklavya2/zulip,dawran6/zulip,rishig/zulip,susansls/zulip,Diptanshu8/zulip,isht3/zulip,jrowan/zulip,blaze225/zulip,isht3/zulip,verma-varsha/zulip,dhcrzf/zulip,blaze225/zulip,jackrzhang/zulip,amyliu345/zulip,rht/zulip,PhilSk/zulip,j831/zulip,dhcrzf/zulip,christi3k/zulip,rht/zulip,tommyip/zulip,blaze225/zulip,eeshangarg/zulip,punchagan/zulip,dattatreya303/zulip,dattatreya303/zulip,samatdav/zulip,timabbott/zulip,SmartPeople/zulip,vaidap/zulip,amanharitsh123/zulip,rishig/zulip,sonali0901/zulip,jrowan/zulip,souravbadami/zulip,timabbott/zulip,hackerkid/zulip,SmartPeople/zulip,dhcrzf/zulip,dattatreya303/zulip,hackerkid/zulip,timabbott/zulip,j831/zulip,brockwhittaker/zulip,hackerkid/zulip,tommyip/zulip,amyliu345/zulip,zulip/zulip,christi3k/zulip,rishig/zulip,amanharitsh123/zulip,jainayush975/zulip,brainwane/zulip,samatdav/zulip,samatdav/zulip,sharmaeklavya2/zulip,zulip/zulip,jrowan/zulip,shubhamdhama/zulip,rishig/zulip,amyliu345/zulip,timabbott/zulip,tommyip/zulip,jainayush975/zulip,vabs22/zulip,eeshangarg/zulip,zulip/zulip,dattatreya303/zulip,isht3/zulip,jrowan/zulip,brockwhittaker/zulip,synicalsyntax/zulip,Diptanshu8/zulip,zulip/zulip,verma-varsha/zulip,mahim97/zulip,aakash-cr7/zulip,jphilipsen05/zulip,brockwhittaker/zulip,brainwane/zulip,jphilipsen05/zulip,susansls/zulip,JPJPJPOPOP/zulip,synicalsyntax/zulip,jphilipsen05/zulip,andersk/zulip,dhcrzf/zulip,zulip/zulip,PhilSk/zulip,Galexrt/zulip,punchagan/zulip,kou/zulip,rishig/zulip,JPJPJPOPOP/zulip