streams: Restore stream name in 'Create streams'.
streams: Restore stream name in 'Create streams'.

On filling out the name and description for new stream,
and changing the tab (e.g. by clicking on a stream on the left),
then come back to 'Create streams', it should restore stream name
similar to the stream description.

Fix #4311.

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