timerender: Add get_full_time function.
timerender: Add get_full_time function.

We'll need to do some iteration, but something like this will be
useful for message edit history.

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